LCM for 70 and 140

The first method to find LCM for numbers 70 and 140 is to find Greatest Common Factor (GCF) of these numbers. Here's the formula:

LCM = (Number1 × Number2) ÷ GCF

GCF of numbers 70 and 140 is 70, so

LCM = (70 × 140) ÷ 70

LCM = 9800 ÷ 70

LCM = 140

The second method to find LCM for numbers 70 and 140 is to list out the common multiples for both nubmers and pick the first which matching:

Multiples of 70: 70, 140, 210, 280

Multiples of 140: 140, 280, 420, 560, 700, 840, 980, 1120, 1260, 1400, 1540, 1680, 1820, 1960, 2100, 2240, 2380, 2520, 2660, 2800, 2940, 3080, 3220, 3360, 3500, 3640, 3780, 3920, 4060, 4200, 4340, 4480, 4620, 4760, 4900, 5040, 5180, 5320, 5460, 5600, 5740, 5880, 6020, 6160, 6300, 6440, 6580, 6720, 6860, 7000, 7140, 7280, 7420, 7560, 7700, 7840, 7980, 8120, 8260, 8400, 8540, 8680, 8820, 8960, 9100, 9240, 9380, 9520, 9660, 9800, 9940, 10080, 10220, 10360, 10500, 10640, 10780, 10920, 11060, 11200, 11340, 11480, 11620, 11760, 11900, 12040, 12180, 12320, 12460, 12600, 12740, 12880, 13020, 13160, 13300, 13440, 13580, 13720, 13860, 14000, 14140, 14280, 14420, 14560, 14700, 14840, 14980, 15120, 15260, 15400, 15540, 15680, 15820, 15960, 16100, 16240, 16380, 16520, 16660, 16800, 16940, 17080, 17220, 17360, 17500, 17640, 17780, 17920, 18060, 18200, 18340, 18480, 18620, 18760, 18900, 19040, 19180, 19320, 19460, 19600, 19740, 19880, 20020, 20160, 20300, 20440, 20580, 20720, 20860, 21000, 21140, 21280, 21420, 21560, 21700, 21840, 21980, 22120, 22260, 22400, 22540, 22680, 22820, 22960, 23100, 23240, 23380, 23520, 23660, 23800, 23940, 24080, 24220, 24360, 24500, 24640, 24780, 24920, 25060, 25200, 25340, 25480, 25620, 25760, 25900, 26040, 26180, 26320, 26460, 26600, 26740, 26880, 27020, 27160, 27300, 27440, 27580, 27720, 27860, 28000, 28140, 28280, 28420, 28560, 28700, 28840, 28980, 29120, 29260, 29400, 29540, 29680, 29820, 29960, 30100, 30240, 30380, 30520, 30660, 30800, 30940, 31080, 31220, 31360, 31500, 31640, 31780, 31920, 32060, 32200, 32340, 32480, 32620, 32760, 32900, 33040, 33180, 33320, 33460, 33600, 33740, 33880, 34020, 34160, 34300, 34440, 34580, 34720, 34860, 35000, 35140, 35280, 35420, 35560, 35700, 35840, 35980, 36120, 36260, 36400, 36540, 36680, 36820, 36960, 37100, 37240, 37380, 37520, 37660, 37800, 37940, 38080, 38220, 38360, 38500, 38640, 38780, 38920, 39060, 39200, 39340, 39480, 39620, 39760, 39900, 40040, 40180, 40320, 40460, 40600, 40740, 40880, 41020, 41160, 41300, 41440, 41580, 41720, 41860, 42000, 42140, 42280, 42420, 42560, 42700, 42840, 42980, 43120, 43260, 43400, 43540, 43680, 43820, 43960, 44100, 44240, 44380, 44520, 44660, 44800, 44940, 45080, 45220, 45360, 45500, 45640, 45780, 45920, 46060, 46200, 46340, 46480, 46620, 46760, 46900, 47040, 47180, 47320, 47460, 47600, 47740, 47880, 48020, 48160, 48300, 48440, 48580, 48720, 48860, 49000, 49140, 49280, 49420, 49560, 49700, 49840, 49980, 50120, 50260, 50400, 50540, 50680, 50820, 50960, 51100, 51240, 51380, 51520, 51660, 51800, 51940, 52080, 52220, 52360, 52500, 52640, 52780, 52920, 53060, 53200, 53340, 53480, 53620, 53760, 53900, 54040, 54180, 54320, 54460, 54600, 54740, 54880, 55020, 55160, 55300, 55440, 55580, 55720, 55860, 56000, 56140, 56280, 56420, 56560, 56700, 56840, 56980, 57120, 57260, 57400, 57540, 57680, 57820, 57960, 58100, 58240, 58380, 58520, 58660, 58800, 58940, 59080, 59220, 59360, 59500, 59640, 59780, 59920, 60060, 60200, 60340, 60480, 60620, 60760, 60900, 61040, 61180, 61320, 61460, 61600, 61740, 61880, 62020, 62160, 62300, 62440, 62580, 62720, 62860, 63000, 63140, 63280, 63420, 63560, 63700, 63840, 63980, 64120, 64260, 64400, 64540, 64680, 64820, 64960, 65100, 65240, 65380, 65520, 65660, 65800, 65940, 66080, 66220, 66360, 66500, 66640, 66780, 66920, 67060, 67200, 67340, 67480, 67620, 67760, 67900, 68040, 68180, 68320, 68460, 68600, 68740, 68880, 69020, 69160, 69300, 69440, 69580, 69720, 69860, 70000, 70140, 70280, 70420, 70560, 70700, 70840, 70980, 71120, 71260, 71400, 71540, 71680, 71820, 71960, 72100, 72240, 72380, 72520, 72660, 72800, 72940, 73080, 73220, 73360, 73500, 73640, 73780, 73920, 74060, 74200, 74340, 74480, 74620, 74760, 74900, 75040, 75180, 75320, 75460, 75600, 75740, 75880, 76020, 76160, 76300, 76440, 76580, 76720, 76860, 77000, 77140, 77280, 77420, 77560, 77700, 77840, 77980, 78120, 78260, 78400, 78540, 78680, 78820, 78960, 79100, 79240, 79380, 79520, 79660, 79800, 79940, 80080, 80220, 80360, 80500, 80640, 80780, 80920, 81060, 81200, 81340, 81480, 81620, 81760, 81900, 82040, 82180, 82320, 82460, 82600, 82740, 82880, 83020, 83160, 83300, 83440, 83580, 83720, 83860, 84000, 84140, 84280, 84420, 84560, 84700, 84840, 84980, 85120, 85260, 85400, 85540, 85680, 85820, 85960, 86100, 86240, 86380, 86520, 86660, 86800, 86940, 87080, 87220, 87360, 87500, 87640, 87780, 87920, 88060, 88200, 88340, 88480, 88620, 88760, 88900, 89040, 89180, 89320, 89460, 89600, 89740, 89880, 90020, 90160, 90300, 90440, 90580, 90720, 90860, 91000, 91140, 91280, 91420, 91560, 91700, 91840, 91980, 92120, 92260, 92400, 92540, 92680, 92820, 92960, 93100, 93240, 93380, 93520, 93660, 93800, 93940, 94080, 94220, 94360, 94500, 94640, 94780, 94920, 95060, 95200, 95340, 95480, 95620, 95760, 95900, 96040, 96180, 96320, 96460, 96600, 96740, 96880, 97020, 97160, 97300, 97440, 97580, 97720, 97860, 98000, 98140, 98280, 98420, 98560, 98700, 98840, 98980, 99120, 99260, 99400, 99540, 99680, 99820, 99960, 100100, 100240, 100380, 100520, 100660, 100800, 100940, 101080, 101220, 101360, 101500, 101640, 101780, 101920, 102060, 102200, 102340, 102480, 102620, 102760, 102900, 103040, 103180, 103320, 103460, 103600, 103740, 103880, 104020, 104160, 104300, 104440, 104580, 104720, 104860, 105000, 105140, 105280, 105420, 105560, 105700, 105840, 105980, 106120, 106260, 106400, 106540, 106680, 106820, 106960, 107100, 107240, 107380, 107520, 107660, 107800, 107940, 108080, 108220, 108360, 108500, 108640, 108780, 108920, 109060, 109200, 109340, 109480, 109620, 109760, 109900, 110040, 110180, 110320, 110460, 110600, 110740, 110880, 111020, 111160, 111300, 111440, 111580, 111720, 111860, 112000, 112140, 112280, 112420, 112560, 112700, 112840, 112980, 113120, 113260, 113400, 113540, 113680, 113820, 113960, 114100, 114240, 114380, 114520, 114660, 114800, 114940, 115080, 115220, 115360, 115500, 115640, 115780, 115920, 116060, 116200, 116340, 116480, 116620, 116760, 116900, 117040, 117180, 117320, 117460, 117600, 117740, 117880, 118020, 118160, 118300, 118440, 118580, 118720, 118860, 119000, 119140, 119280, 119420, 119560, 119700, 119840, 119980, 120120, 120260, 120400, 120540, 120680, 120820, 120960, 121100, 121240, 121380, 121520, 121660, 121800, 121940, 122080, 122220, 122360, 122500, 122640, 122780, 122920, 123060, 123200, 123340, 123480, 123620, 123760, 123900, 124040, 124180, 124320, 124460, 124600, 124740, 124880, 125020, 125160, 125300, 125440, 125580, 125720, 125860, 126000, 126140, 126280, 126420, 126560, 126700, 126840, 126980, 127120, 127260, 127400, 127540, 127680, 127820, 127960, 128100, 128240, 128380, 128520, 128660, 128800, 128940, 129080, 129220, 129360, 129500, 129640, 129780, 129920, 130060, 130200, 130340, 130480, 130620, 130760, 130900, 131040, 131180, 131320, 131460, 131600, 131740, 131880, 132020, 132160, 132300, 132440, 132580, 132720, 132860, 133000, 133140, 133280, 133420, 133560, 133700, 133840, 133980, 134120, 134260, 134400, 134540, 134680, 134820, 134960, 135100, 135240, 135380, 135520, 135660, 135800, 135940, 136080, 136220, 136360, 136500, 136640, 136780, 136920, 137060, 137200, 137340, 137480, 137620, 137760, 137900, 138040, 138180, 138320, 138460, 138600, 138740, 138880, 139020, 139160, 139300, 139440, 139580, 139720, 139860, 140000, [...], 140

So the LCM for 70 and 140 is 140

Another method to find LCM for numbers 70 and 140 is to list all Prime Factors for both numbers and multiply the highest exponent prime factors: