Q: What is the sum of all factors of the number 15,990 excluding 15,990?

 A: 26,346

Why is 26,346 the sum of all factors of 15,990, excluding 15,990?

The factors of the number 15,990 are: 1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 41, 65, 78, 82, 123, 130, 195, 205, 246, 390, 410, 533, 615, 1066, 1230, 1599, 2665, 3198, 5330, 7995, 15990.

If you add them up, you will get the total of 16,016. Now subtract 15,990 to get 26,346


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