Problem 5

2520 is the smallest number that can be divided by each of the numbers from 1 to 10 without any remainder.

What is the smallest number that is evenly divisible by all of the numbers from 1 to 20?

標準ライブラリのlcmを使って一瞬

p005 = foldl1 lcm [1..20]
More Reading
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Older// Problem 6