http://projecteuler.net/problem=12  -  The sequence of triangle numbers is generated by adding the natural numbers. So the 7th triangle number would be 1 + 2 + 3 + 4 + 5 + 6 + 7 = 28. The first ten terms would be:  1, 3, 6, 10, 15, 21, 28, 36, 45, 55, ...  Let us list the factors of the first seven triangle numbers:   1: 1  3: 1,3  6: 1,2,3,6 10: 1,2,5,10 15: 1,3,5,15 21: 1,3,7,21 28: 1,2,4,7,14,28 We can see that 28 is the first triangle number to have over five divisors.  What is the value of the first triangle number to have over five hundred divisors?