LCM for 64 and 128

The first method to find LCM for numbers 64 and 128 is to find Greatest Common Factor (GCF) of these numbers. Here's the formula:

LCM = (Number1 × Number2) ÷ GCF

GCF of numbers 64 and 128 is 64, so

LCM = (64 × 128) ÷ 64

LCM = 8192 ÷ 64

LCM = 128

The second method to find LCM for numbers 64 and 128 is to list out the common multiples for both nubmers and pick the first which matching:

Multiples of 64: 64, 128, 192, 256

Multiples of 128: 128, 256, 384, 512, 640, 768, 896, 1024, 1152, 1280, 1408, 1536, 1664, 1792, 1920, 2048, 2176, 2304, 2432, 2560, 2688, 2816, 2944, 3072, 3200, 3328, 3456, 3584, 3712, 3840, 3968, 4096, 4224, 4352, 4480, 4608, 4736, 4864, 4992, 5120, 5248, 5376, 5504, 5632, 5760, 5888, 6016, 6144, 6272, 6400, 6528, 6656, 6784, 6912, 7040, 7168, 7296, 7424, 7552, 7680, 7808, 7936, 8064, 8192, 8320, 8448, 8576, 8704, 8832, 8960, 9088, 9216, 9344, 9472, 9600, 9728, 9856, 9984, 10112, 10240, 10368, 10496, 10624, 10752, 10880, 11008, 11136, 11264, 11392, 11520, 11648, 11776, 11904, 12032, 12160, 12288, 12416, 12544, 12672, 12800, 12928, 13056, 13184, 13312, 13440, 13568, 13696, 13824, 13952, 14080, 14208, 14336, 14464, 14592, 14720, 14848, 14976, 15104, 15232, 15360, 15488, 15616, 15744, 15872, 16000, 16128, 16256, 16384, 16512, 16640, 16768, 16896, 17024, 17152, 17280, 17408, 17536, 17664, 17792, 17920, 18048, 18176, 18304, 18432, 18560, 18688, 18816, 18944, 19072, 19200, 19328, 19456, 19584, 19712, 19840, 19968, 20096, 20224, 20352, 20480, 20608, 20736, 20864, 20992, 21120, 21248, 21376, 21504, 21632, 21760, 21888, 22016, 22144, 22272, 22400, 22528, 22656, 22784, 22912, 23040, 23168, 23296, 23424, 23552, 23680, 23808, 23936, 24064, 24192, 24320, 24448, 24576, 24704, 24832, 24960, 25088, 25216, 25344, 25472, 25600, 25728, 25856, 25984, 26112, 26240, 26368, 26496, 26624, 26752, 26880, 27008, 27136, 27264, 27392, 27520, 27648, 27776, 27904, 28032, 28160, 28288, 28416, 28544, 28672, 28800, 28928, 29056, 29184, 29312, 29440, 29568, 29696, 29824, 29952, 30080, 30208, 30336, 30464, 30592, 30720, 30848, 30976, 31104, 31232, 31360, 31488, 31616, 31744, 31872, 32000, 32128, 32256, 32384, 32512, 32640, 32768, 32896, 33024, 33152, 33280, 33408, 33536, 33664, 33792, 33920, 34048, 34176, 34304, 34432, 34560, 34688, 34816, 34944, 35072, 35200, 35328, 35456, 35584, 35712, 35840, 35968, 36096, 36224, 36352, 36480, 36608, 36736, 36864, 36992, 37120, 37248, 37376, 37504, 37632, 37760, 37888, 38016, 38144, 38272, 38400, 38528, 38656, 38784, 38912, 39040, 39168, 39296, 39424, 39552, 39680, 39808, 39936, 40064, 40192, 40320, 40448, 40576, 40704, 40832, 40960, 41088, 41216, 41344, 41472, 41600, 41728, 41856, 41984, 42112, 42240, 42368, 42496, 42624, 42752, 42880, 43008, 43136, 43264, 43392, 43520, 43648, 43776, 43904, 44032, 44160, 44288, 44416, 44544, 44672, 44800, 44928, 45056, 45184, 45312, 45440, 45568, 45696, 45824, 45952, 46080, 46208, 46336, 46464, 46592, 46720, 46848, 46976, 47104, 47232, 47360, 47488, 47616, 47744, 47872, 48000, 48128, 48256, 48384, 48512, 48640, 48768, 48896, 49024, 49152, 49280, 49408, 49536, 49664, 49792, 49920, 50048, 50176, 50304, 50432, 50560, 50688, 50816, 50944, 51072, 51200, 51328, 51456, 51584, 51712, 51840, 51968, 52096, 52224, 52352, 52480, 52608, 52736, 52864, 52992, 53120, 53248, 53376, 53504, 53632, 53760, 53888, 54016, 54144, 54272, 54400, 54528, 54656, 54784, 54912, 55040, 55168, 55296, 55424, 55552, 55680, 55808, 55936, 56064, 56192, 56320, 56448, 56576, 56704, 56832, 56960, 57088, 57216, 57344, 57472, 57600, 57728, 57856, 57984, 58112, 58240, 58368, 58496, 58624, 58752, 58880, 59008, 59136, 59264, 59392, 59520, 59648, 59776, 59904, 60032, 60160, 60288, 60416, 60544, 60672, 60800, 60928, 61056, 61184, 61312, 61440, 61568, 61696, 61824, 61952, 62080, 62208, 62336, 62464, 62592, 62720, 62848, 62976, 63104, 63232, 63360, 63488, 63616, 63744, 63872, 64000, 64128, 64256, 64384, 64512, 64640, 64768, 64896, 65024, 65152, 65280, 65408, 65536, 65664, 65792, 65920, 66048, 66176, 66304, 66432, 66560, 66688, 66816, 66944, 67072, 67200, 67328, 67456, 67584, 67712, 67840, 67968, 68096, 68224, 68352, 68480, 68608, 68736, 68864, 68992, 69120, 69248, 69376, 69504, 69632, 69760, 69888, 70016, 70144, 70272, 70400, 70528, 70656, 70784, 70912, 71040, 71168, 71296, 71424, 71552, 71680, 71808, 71936, 72064, 72192, 72320, 72448, 72576, 72704, 72832, 72960, 73088, 73216, 73344, 73472, 73600, 73728, 73856, 73984, 74112, 74240, 74368, 74496, 74624, 74752, 74880, 75008, 75136, 75264, 75392, 75520, 75648, 75776, 75904, 76032, 76160, 76288, 76416, 76544, 76672, 76800, 76928, 77056, 77184, 77312, 77440, 77568, 77696, 77824, 77952, 78080, 78208, 78336, 78464, 78592, 78720, 78848, 78976, 79104, 79232, 79360, 79488, 79616, 79744, 79872, 80000, 80128, 80256, 80384, 80512, 80640, 80768, 80896, 81024, 81152, 81280, 81408, 81536, 81664, 81792, 81920, 82048, 82176, 82304, 82432, 82560, 82688, 82816, 82944, 83072, 83200, 83328, 83456, 83584, 83712, 83840, 83968, 84096, 84224, 84352, 84480, 84608, 84736, 84864, 84992, 85120, 85248, 85376, 85504, 85632, 85760, 85888, 86016, 86144, 86272, 86400, 86528, 86656, 86784, 86912, 87040, 87168, 87296, 87424, 87552, 87680, 87808, 87936, 88064, 88192, 88320, 88448, 88576, 88704, 88832, 88960, 89088, 89216, 89344, 89472, 89600, 89728, 89856, 89984, 90112, 90240, 90368, 90496, 90624, 90752, 90880, 91008, 91136, 91264, 91392, 91520, 91648, 91776, 91904, 92032, 92160, 92288, 92416, 92544, 92672, 92800, 92928, 93056, 93184, 93312, 93440, 93568, 93696, 93824, 93952, 94080, 94208, 94336, 94464, 94592, 94720, 94848, 94976, 95104, 95232, 95360, 95488, 95616, 95744, 95872, 96000, 96128, 96256, 96384, 96512, 96640, 96768, 96896, 97024, 97152, 97280, 97408, 97536, 97664, 97792, 97920, 98048, 98176, 98304, 98432, 98560, 98688, 98816, 98944, 99072, 99200, 99328, 99456, 99584, 99712, 99840, 99968, 100096, 100224, 100352, 100480, 100608, 100736, 100864, 100992, 101120, 101248, 101376, 101504, 101632, 101760, 101888, 102016, 102144, 102272, 102400, 102528, 102656, 102784, 102912, 103040, 103168, 103296, 103424, 103552, 103680, 103808, 103936, 104064, 104192, 104320, 104448, 104576, 104704, 104832, 104960, 105088, 105216, 105344, 105472, 105600, 105728, 105856, 105984, 106112, 106240, 106368, 106496, 106624, 106752, 106880, 107008, 107136, 107264, 107392, 107520, 107648, 107776, 107904, 108032, 108160, 108288, 108416, 108544, 108672, 108800, 108928, 109056, 109184, 109312, 109440, 109568, 109696, 109824, 109952, 110080, 110208, 110336, 110464, 110592, 110720, 110848, 110976, 111104, 111232, 111360, 111488, 111616, 111744, 111872, 112000, 112128, 112256, 112384, 112512, 112640, 112768, 112896, 113024, 113152, 113280, 113408, 113536, 113664, 113792, 113920, 114048, 114176, 114304, 114432, 114560, 114688, 114816, 114944, 115072, 115200, 115328, 115456, 115584, 115712, 115840, 115968, 116096, 116224, 116352, 116480, 116608, 116736, 116864, 116992, 117120, 117248, 117376, 117504, 117632, 117760, 117888, 118016, 118144, 118272, 118400, 118528, 118656, 118784, 118912, 119040, 119168, 119296, 119424, 119552, 119680, 119808, 119936, 120064, 120192, 120320, 120448, 120576, 120704, 120832, 120960, 121088, 121216, 121344, 121472, 121600, 121728, 121856, 121984, 122112, 122240, 122368, 122496, 122624, 122752, 122880, 123008, 123136, 123264, 123392, 123520, 123648, 123776, 123904, 124032, 124160, 124288, 124416, 124544, 124672, 124800, 124928, 125056, 125184, 125312, 125440, 125568, 125696, 125824, 125952, 126080, 126208, 126336, 126464, 126592, 126720, 126848, 126976, 127104, 127232, 127360, 127488, 127616, 127744, 127872, 128000, [...], 128

So the LCM for 64 and 128 is 128

Another method to find LCM for numbers 64 and 128 is to list all Prime Factors for both numbers and multiply the highest exponent prime factors: