Q: What is the sum of all factors of the number 65,680 excluding 65,680?
A: 87,212
The factors of the number 65,680 are: 1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 821, 1642, 3284, 4105, 6568, 8210, 13136, 16420, 32840, 65680.
If you add them up, you will get the total of 65,767. Now subtract 65,680 to get 87,212