Thought Process

Just a bit lazy on this problem, at first I tried to be smart using the divisor function, but it was pretty slow, so I just opted for a simple array on length 64,000,000 where every value is 1 (Because 1 is a divisor of every number)

Then I just go through all numbers, x, 2 ≤  x ≤ 64,000,000, and for each multiple of x less than 64,000,000 I add x*x to its array position (array[i*x] += x*x)

At the end I just check which values in the array are square numbers and sum them up, nothing special, code takes about 10 mins to fully run.