If N is a nonnegative integer, the triangular number T(N)=1+2+3+...+N is given by N(N+1)/2.
Find a prime P such that the sum of the divisors of T(P) is a cube.
****The divisors of a positive integer N includes 1 and N.
So far, I have found no solution testing for N up to 500,000.

Posted by Larry
on 20240415 16:08:08 