LCM for 31 and 39
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What's the Least Common Multiple (LCM) of 31 and 39?
Answer
LCM of 31 and 39 is
1,209
First common multiples: 1,209; 2,418; 3,627; …
1,209 is divisible by both: 1,209 ÷ 31 = 39; 1,209 ÷ 39 = 31 — and 39 and 31 share no factor but 1, so no smaller number is. As a common denominator: multiply the top and bottom of x/31 by 39 and of y/39 by 31.
31 and 39 are coprime (GCF = 1), so their LCM is simply the product: 31 × 39 = 1,209.
31 — prime
39 = 3 × 13
| Prime | 31 | 39 | Highest power |
|---|---|---|---|
| 3 | — | 3 | 3 |
| 13 | — | 13 | 13 |
| 31 | 31 | — | 31 |
— = power 0: the prime is not a factor of this number; the LCM takes it from the number that has it.
LCM = 3 × 13 × 31 = 1,209
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See Also
- Greatest Common Factor - Find the Greatest Common Factor (GCF) of two numbers
- Least Common Multiple of 3 Numbers - Find the Least Common Multiple (LCM) of three numbers
- Greatest Common Factor of 3 Numbers - Find the Greatest Common Factor (GCF) of three numbers
- Multiples of a Number - List the first 10 multiples of any number from 1 to 999
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