LCM for 20 and 470
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What's the Least Common Multiple (LCM) of 20 and 470?
Answer
LCM of 20 and 470 is
940
First common multiples: 940; 1,880; 2,820; …
940 is divisible by both: 940 ÷ 20 = 47, 940 ÷ 470 = 2 — and 47 and 2 share no factor but 1, so no smaller number is. As a common denominator: multiply the top and bottom of x/20 by 47 and of y/470 by 2.
20 = 22 × 5
470 = 2 × 5 × 47
| Prime | 20 | 470 | Highest power |
|---|---|---|---|
| 2 | 22 | 2 | 22 |
| 5 | 5 | 5 | 5 |
| 47 | — | 47 | 47 |
— = power 0: the prime is not a factor of this number; the LCM takes it from the number that has it.
LCM = 22 × 5 × 47 = 940
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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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