Q: What is the sum of all factors of the number 21,801 excluding 21,801?
A: 10,407
The factors of the number 21,801 are: 1, 3, 13, 39, 43, 129, 169, 507, 559, 1677, 7267, 21801.
If you add them up, you will get the total of 21,811. Now subtract 21,801 to get 10,407