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Problem 5

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Smallest multiple

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

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

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最小公倍数

$2520$是最小的能够被$1$到$10$整除的正数。

最小的能够被$1$到$20$整除的正数是多少？

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