Problem 44748. Amicable numbers

Created by vandeleeuw
Appears in Chemical Engineering Problems II

Difficulty:Rate

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Test whether two numbers are amicable, meaning that the sum of the proper divisors of each number is equal to the other number.

Example: 220 and 284 are amicable numbers because the proper divisors of 220 are 1,2,4,5,10,11,20,22,44,55,110 and their sum is 284, while the proper divisors of 284 are 1,2,4,71,142 and their sum is 220.

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Last Solution submitted on Feb 23, 2025

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vandeleeuw on 24 Oct 2018

I think it's because divisors is part of a toolbox, I did not set it up not to allow it.

Kristopher Powers on 24 Oct 2018

@cdeliu I have solved another problem in Community and I still am unable to see the best solution. Could you help to give advice on this.

vandeleeuw on 24 Oct 2018

If divisors function is not allowed, you should somehow generate these divisors. The best solution uses the mod function.

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Number theory

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