Special Number

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Chef loves mathematics and solving problems makes him happy, however one uneventful day he got stuck on a problem which he couldn’t solve. Can you help him solve this problem? Chef’s looking for a special number! Let $N$ be the number and $A1, A2,….An$ be its $proper$ (divisors including 1 but not itself) divisors. A number is said to be special if: 1. The sum of all its proper divisors

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solution.cppC++17

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