Q: What is the sum of all factors of the number 639,675 excluding 639,675?
A: 506,457
The factors of the number 639,675 are: 1, 3, 5, 9, 15, 25, 45, 75, 225, 2843, 8529, 14215, 25587, 42645, 71075, 127935, 213225, 639675.
If you add them up, you will get the total of 640,181. Now subtract 639,675 to get 506,457