Q: What is the sum of all factors of the number 45 excluding 45?

 A: 33

Why is 33 the sum of all factors of 45, excluding 45?

The factors of the number 45 are: 1, 3, 5, 9, 15, 45.

If you add them up, you will get the total of 78. Now subtract 45 to get 33


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