Q: What is the sum of all factors of the number 30 excluding 30?

 A: 42

Why is 42 the sum of all factors of 30, excluding 30?

The factors of the number 30 are: 1, 2, 3, 5, 6, 10, 15, 30.

If you add them up, you will get the total of 72. Now subtract 30 to get 42


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