Q: What is the sum of all factors of the number 664,016,721 excluding 664,016,721?

 A: 222,099,663

Why is 222,099,663 the sum of all factors of 664,016,721, excluding 664,016,721?

The factors of the number 664,016,721 are: 1, 3, 1171, 3513, 189017, 567051, 221338907, 664016721.

If you add them up, you will get the total of 664,016,943. Now subtract 664,016,721 to get 222,099,663


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