Q: What is the sum of all factors of the number 128,280 excluding 128,280?

 A: 256,920

Why is 256,920 the sum of all factors of 128,280, excluding 128,280?

The factors of the number 128,280 are: 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 1069, 2138, 3207, 4276, 5345, 6414, 8552, 10690, 12828, 16035, 21380, 25656, 32070, 42760, 64140, 128280.

If you add them up, you will get the total of 128,536. Now subtract 128,280 to get 256,920


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