Q: What is the sum of all factors of the number 2,561,871 excluding 2,561,871?
A: 1,279,665
The factors of the number 2,561,871 are: 1, 3, 13, 31, 39, 93, 163, 169, 403, 489, 507, 1209, 2119, 5053, 5239, 6357, 15159, 15717, 27547, 65689, 82641, 197067, 853957, 2561871.
If you add them up, you will get the total of 2,561,872. Now subtract 2,561,871 to get 1,279,665