Q: What is the sum of all factors of the number 645,020 excluding 645,020?
A: 709,564
The factors of the number 645,020 are: 1, 2, 4, 5, 10, 20, 32251, 64502, 129004, 161255, 322510, 645020.
If you add them up, you will get the total of 645,729. Now subtract 645,020 to get 709,564