Q: What is the sum of all factors of the number 21,021,128 excluding 21,021,128?

 A: 18,417,817

Why is 18,417,817 the sum of all factors of 21,021,128, excluding 21,021,128?

The factors of the number 21,021,128 are: 1, 2, 4, 8, 1621, 3242, 6484, 12968, 2627641, 5255282, 10510564, 21021128.

If you add them up, you will get the total of 21,021,146. Now subtract 21,021,128 to get 18,417,817


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