Q: What is the sum of all factors of the number 6,640 excluding 6,640?
A: 8,984
The factors of the number 6,640 are: 1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 83, 166, 332, 415, 664, 830, 1328, 1660, 3320, 6640.
If you add them up, you will get the total of 6,648. Now subtract 6,640 to get 8,984