Q: What is the sum of all factors of the number 289,960 excluding 289,960?

 A: 422,840

Why is 422,840 the sum of all factors of 289,960, excluding 289,960?

The factors of the number 289,960 are: 1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 659, 1318, 2636, 3295, 5272, 6590, 7249, 13180, 14498, 26360, 28996, 36245, 57992, 72490, 144980, 289960.

If you add them up, you will get the total of 290,382. Now subtract 289,960 to get 422,840


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