Q: What is the sum of all factors of the number 640,990 excluding 640,990?
A: 677,762
The factors of the number 640,990 are: 1, 2, 5, 7, 10, 14, 35, 70, 9157, 18314, 45785, 64099, 91570, 128198, 320495, 640990.
If you add them up, you will get the total of 641,667. Now subtract 640,990 to get 677,762