Q: What is the sum of all factors of the number 12,990,991 excluding 12,990,991?

 A: 999,321

Why is 999,321 the sum of all factors of 12,990,991, excluding 12,990,991?

The factors of the number 12,990,991 are: 1, 13, 999307, 12990991.

If you add them up, you will get the total of 12,991,990. Now subtract 12,990,991 to get 999,321


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