Q: What is the sum of all factors of the number 638,385,680 excluding 638,385,680?
A: 845,861,212
The factors of the number 638,385,680 are: 1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 7979821, 15959642, 31919284, 39899105, 63838568, 79798210, 127677136, 159596420, 319192840, 638385680.
If you add them up, you will get the total of 638,386,525. Now subtract 638,385,680 to get 845,861,212