Q: What is the sum of all factors of the number 640,072 excluding 640,072?
A: 623,528
The factors of the number 640,072 are: 1, 2, 4, 8, 19, 38, 76, 152, 4211, 8422, 16844, 33688, 80009, 160018, 320036, 640072.
If you add them up, you will get the total of 640,695. Now subtract 640,072 to get 623,528