Q: What is the sum of all factors of the number 100,400 excluding 100,400?

 A: 141,772

Why is 141,772 the sum of all factors of 100,400, excluding 100,400?

The factors of the number 100,400 are: 1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 251, 400, 502, 1004, 1255, 2008, 2510, 4016, 5020, 6275, 10040, 12550, 20080, 25100, 50200, 100400.

If you add them up, you will get the total of 100,541. Now subtract 100,400 to get 141,772


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