- 题目描述：
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The least common multiple (LCM) of a set of positive integers is the smallest positive integer which is divisible by all the numbers in the set. For example, the LCM of 5, 7 and 15 is 105.The least common multipl
阅读背景：
九度OJ 1056--最大公约数 1439--Least Common Multiple 【辗转相除法】
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