Q: What is the sum of all factors of the number 640,768 excluding 640,768?

 A: 638,776

Why is 638,776 the sum of all factors of 640,768, excluding 640,768?

The factors of the number 640,768 are: 1, 2, 4, 8, 16, 32, 64, 128, 256, 2503, 5006, 10012, 20024, 40048, 80096, 160192, 320384, 640768.

If you add them up, you will get the total of 641,406. Now subtract 640,768 to get 638,776


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