Q: What is the sum of all factors of the number 640,633,634 excluding 640,633,634?

 A: 320,937,886

Why is 320,937,886 the sum of all factors of 640,633,634, excluding 640,633,634?

The factors of the number 640,633,634 are: 1, 2, 1559, 3118, 205463, 410926, 320316817, 640633634.

If you add them up, you will get the total of 640,633,954. Now subtract 640,633,634 to get 320,937,886


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