Q: What is the sum of all factors of the number 21,789 excluding 21,789?
A: 10,881
The factors of the number 21,789 are: 1, 3, 9, 27, 81, 269, 807, 2421, 7263, 21789.
If you add them up, you will get the total of 21,799. Now subtract 21,789 to get 10,881