Q: What is the sum of all factors of the number 1,020 excluding 1,020?

 A: 2,004

Why is 2,004 the sum of all factors of 1,020, excluding 1,020?

The factors of the number 1,020 are: 1, 2, 3, 4, 5, 6, 10, 12, 15, 17, 20, 30, 34, 51, 60, 68, 85, 102, 170, 204, 255, 340, 510, 1020.

If you add them up, you will get the total of 1,022. Now subtract 1,020 to get 2,004


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