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[函数] 使$S$中元素的和等于元素的积

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isee posted 2017-9-6 14:55 |Read mode

题目：求由正整数组成的集合$S$,使$S$中元素的和等于元素的积。

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游客 posted 2017-9-6 15:10

只有123吧

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original poster isee posted 2017-9-6 15:11

回复 2# 游客

百密一疏啊，还有单元素集。

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original poster isee posted 2017-9-21 16:28

此题应该是没人再感兴趣了，把单墫的解法发来——仅讨论非单元集时。

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