Q: What is the sum of all factors of the number 21,284 excluding 21,284?
A: 18,280
The factors of the number 21,284 are: 1, 2, 4, 17, 34, 68, 313, 626, 1252, 5321, 10642, 21284.
If you add them up, you will get the total of 21,302. Now subtract 21,284 to get 18,280