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

 A: 243,604

Why is 243,604 the sum of all factors of 221,420, excluding 221,420?

The factors of the number 221,420 are: 1, 2, 4, 5, 10, 20, 11071, 22142, 44284, 55355, 110710, 221420.

If you add them up, you will get the total of 221,663. Now subtract 221,420 to get 243,604


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