Q: What is the sum of all factors of the number 666,663,345 excluding 666,663,345?

 A: 518,516,175

Why is 518,516,175 the sum of all factors of 666,663,345, excluding 666,663,345?

The factors of the number 666,663,345 are: 1, 3, 5, 9, 15, 27, 45, 135, 4938247, 14814741, 24691235, 44444223, 74073705, 133332669, 222221115, 666663345.

If you add them up, you will get the total of 666,663,863. Now subtract 666,663,345 to get 518,516,175


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