Q: What is the sum of all factors of the number 10,680 excluding 10,680?

 A: 21,720

Why is 21,720 the sum of all factors of 10,680, excluding 10,680?

The factors of the number 10,680 are: 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 89, 120, 178, 267, 356, 445, 534, 712, 890, 1068, 1335, 1780, 2136, 2670, 3560, 5340, 10680.

If you add them up, you will get the total of 10,701. Now subtract 10,680 to get 21,720


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