You need a divisor of 180k for whatever k.

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• 這也是我的理解，可是如果那樣的話 -新手008- ♀ (70 bytes) () 08/30/2023 postreply 11:21:57

• divisor of 180k for whatever k = divisor of 180 -trivial- ♀ (42 bytes) () 08/30/2023 postreply 11:35:15