Q: What is the sum of all factors of the number 2,840 excluding 2,840?
A: 3,640
The factors of the number 2,840 are: 1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840.
If you add them up, you will get the total of 2,843. Now subtract 2,840 to get 3,640