Q: What is the sum of all factors of the number 3,045 excluding 3,045?

A: 2,715

Why is 2,715 the sum of all factors of 3,045, excluding 3,045?

The factors of the number 3,045 are: 1, 3, 5, 7, 15, 21, 29, 35, 87, 105, 145, 203, 435, 609, 1015, 3045.

If you add them up, you will get the total of 3,047. Now subtract 3,045 to get 2,715

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