Why is 2,160 the sum of all factors of 870, including 870?
The factors of the number 870 are: 1, 2, 3, 5, 6, 10, 15, 29, 30, 58, 87, 145, 174, 290, 435, 870.
If you add them up, you will get the total of 2,160.
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