Q: What is the sum of all factors of the number 42,420,421 excluding 42,420,421?

 A: 13,211

Why is 13,211 the sum of all factors of 42,420,421, excluding 42,420,421?

The factors of the number 42,420,421 are: 1, 5507, 7703, 42420421.

If you add them up, you will get the total of 42,420,434. Now subtract 42,420,421 to get 13,211


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