two numbers are called amicable if each is the sum of the proper divisors of the other220 and 284 are amicable numbers because 1+2+4+5+10+11+20+22+44+55+110 (proper divisors of 220) = 284 1+2+4+71+142 (proper divisors of 284) = 220
Submitted by:
Samuel Chung from Mexico on 30/09/2018