Q: What is the sum of all factors of the number 420,421,425 excluding 420,421,425?

 A: 274,675,455

Why is 274,675,455 the sum of all factors of 420,421,425, excluding 420,421,425?

The factors of the number 420,421,425 are: 1, 3, 5, 15, 25, 75, 5605619, 16816857, 28028095, 84084285, 140140475, 420421425.

If you add them up, you will get the total of 420,421,699. Now subtract 420,421,425 to get 274,675,455


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