Q: What is the sum of all factors of the number 129,640 excluding 129,640?

 A: 204,440

Why is 204,440 the sum of all factors of 129,640, excluding 129,640?

The factors of the number 129,640 are: 1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 463, 926, 1852, 2315, 3241, 3704, 4630, 6482, 9260, 12964, 16205, 18520, 25928, 32410, 64820, 129640.

If you add them up, you will get the total of 129,844. Now subtract 129,640 to get 204,440


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