LCM for 15, 40 and 60
"Least Common Multiple of 3 Numbers" Calculator
What's the Least Common Multiple (LCM) of 15, 40 and 60?
Answer
LCM of 15, 40 and 60 is
120
First common multiples: 120, 240, 360, …
120 is divisible by all three: 120 ÷ 15 = 8, 120 ÷ 40 = 3, 120 ÷ 60 = 2 — and 8, 3 and 2 have no factor but 1 common to all of them, so no smaller number is. As a common denominator: multiply the top and bottom of x/15 by 8 and of y/40 by 3 and of z/60 by 2.
15 = 3 × 5
40 = 23 × 5
60 = 22 × 3 × 5
| Prime | 15 | 40 | 60 | Highest power |
|---|---|---|---|---|
| 2 | — | 23 | 22 | 23 |
| 3 | 3 | — | 3 | 3 |
| 5 | 5 | 5 | 5 | 5 |
— = power 0: the prime is not a factor of this number; the LCM takes it from the number that has it.
LCM = 23 × 3 × 5 = 120
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See Also
- Greatest Common Factor of 3 Numbers - Find the Greatest Common Factor (GCF) of three numbers
- Least Common Multiple - Find the Least Common Multiple (LCM) of two numbers
- Greatest Common Factor - Find the Greatest Common Factor (GCF) of two numbers
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LCM Table
| 1st | 2nd | 3rd | LCM |
|---|---|---|---|
| 15 | 40 | 45 | 360 |
| 15 | 40 | 46 | 2,760 |
| 15 | 40 | 47 | 5,640 |
| 15 | 40 | 48 | 240 |
| 15 | 40 | 49 | 5,880 |
| 15 | 40 | 50 | 600 |
| 15 | 40 | 51 | 2,040 |
| 15 | 40 | 52 | 1,560 |
| 15 | 40 | 53 | 6,360 |
| 15 | 40 | 54 | 1,080 |
| 15 | 40 | 55 | 1,320 |
| 15 | 40 | 56 | 840 |
| 15 | 40 | 57 | 2,280 |
| 15 | 40 | 58 | 3,480 |
| 15 | 40 | 59 | 7,080 |
| 15 | 40 | 60 | 120 |
| 15 | 40 | 61 | 7,320 |
| 15 | 40 | 62 | 3,720 |
| 15 | 40 | 63 | 2,520 |
| 15 | 40 | 64 | 960 |
| 15 | 40 | 65 | 1,560 |
| 15 | 40 | 66 | 1,320 |
| 15 | 40 | 67 | 8,040 |
| 15 | 40 | 68 | 2,040 |
| 15 | 40 | 69 | 2,760 |
| 15 | 40 | 70 | 840 |
| 15 | 40 | 71 | 8,520 |
| 15 | 40 | 72 | 360 |
| 15 | 40 | 73 | 8,760 |
| 15 | 40 | 74 | 4,440 |