PUMaC 2008 · 数论（B 组） · 第 6 题
PUMaC 2008 — Number Theory (Division B) — Problem 6
题目详情
- (4 points) f ( n ) is the sum of all integers less than n and relatively prime to n . Find all integers n k l such that there exist integers k and l such that f ( n ) = n .
解析
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Original Explanation
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