Q: What is the sum of all factors of the number 39,720 excluding 39,720?

 A: 79,800

Why is 79,800 the sum of all factors of 39,720, excluding 39,720?

The factors of the number 39,720 are: 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 331, 662, 993, 1324, 1655, 1986, 2648, 3310, 3972, 4965, 6620, 7944, 9930, 13240, 19860, 39720.

If you add them up, you will get the total of 39,799. Now subtract 39,720 to get 79,800


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