Q: What is the sum of all factors of the number 420,221,401 excluding 420,221,401?

 A: 1

Why is 1 the sum of all factors of 420,221,401, excluding 420,221,401?

The factors of the number 420,221,401 are: 1, 420221401.

If you add them up, you will get the total of 420,221,402. Now subtract 420,221,401 to get 1


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