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Omni-MATH / For each positive integer k denote C(k) to be sum of its distinct prime divisors. For example C(1)=0,C(2)=2,C(45)=8. Find all positive integers n for which C(2^(n)+1)=C(n). · Discussion

Discussing For each positive integer k denote C(k) to be sum of its distinct prime divisors. For example C(1)=0,C(2)=2,C(45)=8. Find all positive integers n for which C(2^(n)+1)=C(n). · Omni-MATH

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