Q: What is the sum of all factors of the number 1,990,990 excluding 1,990,990?

 A: 1,629,458

Why is 1,629,458 the sum of all factors of 1,990,990, excluding 1,990,990?

The factors of the number 1,990,990 are: 1, 2, 5, 10, 103, 206, 515, 1030, 1933, 3866, 9665, 19330, 199099, 398198, 995495, 1990990.

If you add them up, you will get the total of 1,990,991. Now subtract 1,990,990 to get 1,629,458


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