Q: What is the sum of all factors of the number 172,720 excluding 172,720?

 A: 255,824

Why is 255,824 the sum of all factors of 172,720, excluding 172,720?

The factors of the number 172,720 are: 1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 127, 136, 170, 254, 272, 340, 508, 635, 680, 1016, 1270, 1360, 2032, 2159, 2540, 4318, 5080, 8636, 10160, 10795, 17272, 21590, 34544, 43180, 86360, 172720.

If you add them up, you will get the total of 172,975. Now subtract 172,720 to get 255,824


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