Q: What is the sum of all factors of the number 3,990 including 3,990?

 A: 11,520

Why is 11,520 the sum of all factors of 3,990, including 3,990?

The factors of the number 3,990 are: 1, 2, 3, 5, 6, 7, 10, 14, 15, 19, 21, 30, 35, 38, 42, 57, 70, 95, 105, 114, 133, 190, 210, 266, 285, 399, 570, 665, 798, 1330, 1995, 3990.

If you add them up, you will get the total of 11,520.


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