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Omni-MATH / Let φ(n) denote the number of positive integers less than or equal to n which are relatively prime to n. Let S be the set of positive integers n such that (2n)/(φ(n)) is an integer… · Discussion

Discussing Let φ(n) denote the number of positive integers less than or equal to n which are relatively prime to n. Let S be the set of positive integers n such that (2n)/(φ(n)) is an integer… · Omni-MATH

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