Q: What is the sum of all factors of the number 20,490 excluding 20,490?

 A: 28,758

Why is 28,758 the sum of all factors of 20,490, excluding 20,490?

The factors of the number 20,490 are: 1, 2, 3, 5, 6, 10, 15, 30, 683, 1366, 2049, 3415, 4098, 6830, 10245, 20490.

If you add them up, you will get the total of 20,518. Now subtract 20,490 to get 28,758


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