Q: What is the sum of all factors of the number 1,221,420 excluding 1,221,420?

 A: 2,198,724

Why is 2,198,724 the sum of all factors of 1,221,420, excluding 1,221,420?

The factors of the number 1,221,420 are: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 20357, 40714, 61071, 81428, 101785, 122142, 203570, 244284, 305355, 407140, 610710, 1221420.

If you add them up, you will get the total of 1,221,422. Now subtract 1,221,420 to get 2,198,724


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