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

 A: 22

Why is 22 the sum of all factors of 20, excluding 20?

The factors of the number 20 are: 1, 2, 4, 5, 10, 20.

If you add them up, you will get the total of 42. Now subtract 20 to get 22


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