Q: What is the sum of all factors of the number 51,135 excluding 51,135?

A: 42,561

Why is 42,561 the sum of all factors of 51,135, excluding 51,135?

The factors of the number 51,135 are: 1, 3, 5, 7, 15, 21, 35, 105, 487, 1461, 2435, 3409, 7305, 10227, 17045, 51135.

If you add them up, you will get the total of 51,177. Now subtract 51,135 to get 42,561

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