Q: What is the sum of all factors of the number 640,880 excluding 640,880?
A: 849,352
The factors of the number 640,880 are: 1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 8011, 16022, 32044, 40055, 64088, 80110, 128176, 160220, 320440, 640880.
If you add them up, you will get the total of 641,729. Now subtract 640,880 to get 849,352