Q: What is the sum of all factors of the number 21,303 excluding 21,303?
A: 10,641
The factors of the number 21,303 are: 1, 3, 9, 27, 81, 263, 789, 2367, 7101, 21303.
If you add them up, you will get the total of 21,313. Now subtract 21,303 to get 10,641