Q: What is the sum of all factors of the number 21,951 excluding 21,951?
A: 10,961
The factors of the number 21,951 are: 1, 3, 9, 27, 81, 271, 813, 2439, 7317, 21951.
If you add them up, you will get the total of 21,961. Now subtract 21,951 to get 10,961