Q: What is the sum of all factors of the number 420,100,401 excluding 420,100,401?

 A: 220,385,999

Why is 220,385,999 the sum of all factors of 420,100,401, excluding 420,100,401?

The factors of the number 420,100,401 are: 1, 3, 7, 21, 2539, 7617, 7879, 17773, 23637, 53319, 55153, 165459, 20004781, 60014343, 140033467, 420100401.

If you add them up, you will get the total of 420,100,621. Now subtract 420,100,401 to get 220,385,999


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