Q: What is the sum of all factors of the number 81,660 excluding 81,660?

 A: 147,156

Why is 147,156 the sum of all factors of 81,660, excluding 81,660?

The factors of the number 81,660 are: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 1361, 2722, 4083, 5444, 6805, 8166, 13610, 16332, 20415, 27220, 40830, 81660.

If you add them up, you will get the total of 81,807. Now subtract 81,660 to get 147,156


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