Q: What is the sum of all factors of the number 640,665,420 excluding 640,665,420?
A: 1,153,197,924
The factors of the number 640,665,420 are: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 10677757, 21355514, 32033271, 42711028, 53388785, 64066542, 106777570, 128133084, 160166355, 213555140, 320332710, 640665420.
If you add them up, you will get the total of 640,665,421. Now subtract 640,665,420 to get 1,153,197,924