Q: What is the sum of all factors of the number 640,633,638 excluding 640,633,638?

 A: 640,633,650

Why is 640,633,650 the sum of all factors of 640,633,638, excluding 640,633,638?

The factors of the number 640,633,638 are: 1, 2, 3, 6, 106772273, 213544546, 320316819, 640633638.

If you add them up, you will get the total of 640,634,278. Now subtract 640,633,638 to get 640,633,650


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