Q: What is the sum of all factors of the number 21,120,005 excluding 21,120,005?

 A: 4,394,995

Why is 4,394,995 the sum of all factors of 21,120,005, excluding 21,120,005?

The factors of the number 21,120,005 are: 1, 5, 149, 745, 28349, 141745, 4224001, 21120005.

If you add them up, you will get the total of 21,120,009. Now subtract 21,120,005 to get 4,394,995


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