Q: What is the sum of all factors of the number 20,680 excluding 20,680?

 A: 31,160

Why is 31,160 the sum of all factors of 20,680, excluding 20,680?

The factors of the number 20,680 are: 1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 47, 55, 88, 94, 110, 188, 220, 235, 376, 440, 470, 517, 940, 1034, 1880, 2068, 2585, 4136, 5170, 10340, 20680.

If you add them up, you will get the total of 20,711. Now subtract 20,680 to get 31,160


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