Apocalyptic numbers
Source: Rioplatense Olympiad 2012, Level 3, Problem 1
August 26, 2014
number theoryprime factorizationnumber theory proposed
Problem Statement
An integer is called apocalyptic if the addition of different positive divisors of gives . For example, is apocalyptic, because it has six divisors, , , , , and , that add up to .Find the smallest positive apocalyptic number.