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post #1 of (permalink) Old 02-04-2017, 09:47 AM - Thread Starter
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A new math project to find amicable numbers.




If you were wondering what an amicable number is, from Wikipedia:


Amicable numbers are two different numbers so related that the sum of the proper divisors of each is equal to the other number. (A proper divisor of a number is a positive factor of that number other than the number itself.


The smallest pair of amicable numbers is (220, 284). They are amicable because the proper divisors of 220 are 1, 2, 4, 5, 10, 11, 20, 22, 44, 55 and 110, of which the sum is 284; and the proper divisors of 284 are 1, 2, 4, 71 and 142, of which the sum is 220.


Not sure these have much more value than trillion digit primes, but its something to crunch for WUProp stars.

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