Q: What is the sum of all factors of the number 21,628,421 excluding 21,628,421?

 A: 697,723

Why is 697,723 the sum of all factors of 21,628,421, excluding 21,628,421?

The factors of the number 21,628,421 are: 1, 31, 697691, 21628421.

If you add them up, you will get the total of 21,629,118. Now subtract 21,628,421 to get 697,723


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