Q: What is the sum of all factors of the number 2,556 excluding 2,556?
A: 3,996
The factors of the number 2,556 are: 1, 2, 3, 4, 6, 9, 12, 18, 36, 71, 142, 213, 284, 426, 639, 852, 1278, 2556.
If you add them up, you will get the total of 2,559. Now subtract 2,556 to get 3,996