Q: What is the sum of all factors of the number 7,640 excluding 7,640?
A: 9,640
The factors of the number 7,640 are: 1, 2, 4, 5, 8, 10, 20, 40, 191, 382, 764, 955, 1528, 1910, 3820, 7640.
If you add them up, you will get the total of 7,649. Now subtract 7,640 to get 9,640