Q: What is the sum of all factors of the number 642,663 excluding 642,663?
A: 428,849
The factors of the number 642,663 are: 1, 3, 7, 9, 21, 63, 101, 303, 707, 909, 2121, 6363, 10201, 30603, 71407, 91809, 214221, 642663.
If you add them up, you will get the total of 643,091. Now subtract 642,663 to get 428,849