Q: What is the sum of all factors of the number 640,648 excluding 640,648?
A: 578,132
The factors of the number 640,648 are: 1, 2, 4, 8, 73, 146, 292, 584, 1097, 2194, 4388, 8776, 80081, 160162, 320324, 640648.
If you add them up, you will get the total of 641,226. Now subtract 640,648 to get 578,132