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Superperfect Number
March 23, 2017

Given an integer n. Check whether the number n is superperfect number or not. A superperfect number is a positive integer which satisfies σ2(n) = σ(σ(n)) = 2n, where σ is divisor summatory function. Input: n = 16 Output: yes Explanation: 16 is a superperfect number as σ(16) = 1 + 2 + 4 +… Read More »