4 ms·

There is only one number - look for perfect numbers. or: https://web.archive.org/web/20091027122658/http://geocities.com/~harveyh/narciss.htm#PPDI https://web.

by wingi 10y ago

There is only one number - look for perfect numbers. or: https://web.archive.org/web/20091027122658/http://geocities.com/~harveyh/narciss.htm#PPDI https://web.archive.org/web/20091027122658/http://geocities.... (Armstrong) Numbers

ezequiel-garzon 10y ago
Plenty of even perfect numbers. Find some odd ones!