LCM for 20 and 445
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What's the Least Common Multiple (LCM) of 20 and 445?
Answer
LCM of 20 and 445 is
1,780
First common multiples: 1,780; 3,560; 5,340; …
1,780 is divisible by both: 1,780 ÷ 20 = 89; 1,780 ÷ 445 = 4 — and 89 and 4 share no factor but 1, so no smaller number is. As a common denominator: multiply the top and bottom of x/20 by 89 and of y/445 by 4.
20 = 22 × 5
445 = 5 × 89
| Prime | 20 | 445 | Highest power |
|---|---|---|---|
| 2 | 22 | — | 22 |
| 5 | 5 | 5 | 5 |
| 89 | — | 89 | 89 |
— = power 0: the prime is not a factor of this number; the LCM takes it from the number that has it.
LCM = 22 × 5 × 89 = 1,780
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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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