Q: What is the sum of all factors of the number 641,120 excluding 641,120?

 A: 873,904

Why is 873,904 the sum of all factors of 641,120, excluding 641,120?

The factors of the number 641,120 are: 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 4007, 8014, 16028, 20035, 32056, 40070, 64112, 80140, 128224, 160280, 320560, 641120.

If you add them up, you will get the total of 641,993. Now subtract 641,120 to get 873,904


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