Q: What is the sum of all factors of the number 402,021 excluding 402,021?
A: 209,499
The factors of the number 402,021 are: 1, 3, 9, 19, 57, 171, 2351, 7053, 21159, 44669, 134007, 402021.
If you add them up, you will get the total of 402,230. Now subtract 402,021 to get 209,499