Q: What is the sum of all factors of the number 4,480 excluding 4,480?

 A: 7,760

Why is 7,760 the sum of all factors of 4,480, excluding 4,480?

The factors of the number 4,480 are: 1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 64, 70, 80, 112, 128, 140, 160, 224, 280, 320, 448, 560, 640, 896, 1120, 2240, 4480.

If you add them up, you will get the total of 4,487. Now subtract 4,480 to get 7,760


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