Q: What is the sum of all factors of the number 423,040 excluding 423,040?

 A: 589,820

Why is 589,820 the sum of all factors of 423,040, excluding 423,040?

The factors of the number 423,040 are: 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 661, 1322, 2644, 3305, 5288, 6610, 10576, 13220, 21152, 26440, 42304, 52880, 84608, 105760, 211520, 423040.

If you add them up, you will get the total of 423,629. Now subtract 423,040 to get 589,820


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