Problem 60935. Compute the antisigma function

The sum of divisors function, or sigma(n), is the sum of the numbers that divide n. The antisigma function is the sum of numbers less than n that do not divide n. For example, antisigma(15) = 2+4+6+7+8+9+10+11+12+13+14 = 96.
Write a function that computes the antisigma function.
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81.82% Correct | 18.18% Incorrect
Last Solution submitted on Oct 14, 2025

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