What are Amicable pairs?
284 can be divided by 1, 2, 4, 71, 142. The sum of these 5 numbers is 220. Also sum of all 220 divisors is 284.
That is why 220 and 284 are called Amicable numbers. And this pair was either discovered or known already by Pythagoras.
The next Amicable pair is (1184, 1210).
There is a BOINC project to find out all the pairs up to 10^21. https://sech.me/boinc/Amicable/
Newly discovered pairs are being published on the project page: https://sech.me/ap/
Total known pairs is 1,226,291,419
Want to be part and continue the pythagorean search?
Amicable numbers are running on CPU and GPU and best to be run on a PC. I do not run it on mobile phones, at least.
This project is also whitelisted with the GRCPool that is an additional option to get some Amicable Gridcoins.