LCM for 64 and 80
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What's the Least Common Multiple (LCM) of 64 and 80?
Answer
LCM of 64 and 80 is
320
First common multiples: 320, 640, 960, …
320 is divisible by both: 320 ÷ 64 = 5, 320 ÷ 80 = 4 — and 5 and 4 share no factor but 1, so no smaller number is. As a common denominator: multiply the top and bottom of x/64 by 5 and of y/80 by 4.
64 = 26
80 = 24 × 5
| Prime | 64 | 80 | Highest power |
|---|---|---|---|
| 2 | 26 | 24 | 26 |
| 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 = 26 × 5 = 320
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- 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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