Mathematics, 07.04.2020 16:01 loanyst7513
A positive integer n is perfect if and only if the sum of its divisors is equal to 2n (including the number n itself). Prove that if a natural number is perfect, then the sum of the reciprocals of all its divisors (including n) is 2.
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A positive integer n is perfect if and only if the sum of its divisors is equal to 2n (including the...
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