Q: What is the sum of all factors of the number 40,720 excluding 40,720?

 A: 54,140

Why is 54,140 the sum of all factors of 40,720, excluding 40,720?

The factors of the number 40,720 are: 1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 509, 1018, 2036, 2545, 4072, 5090, 8144, 10180, 20360, 40720.

If you add them up, you will get the total of 40,774. Now subtract 40,720 to get 54,140


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