Q: What is the sum of all factors of the number 644,465,420 excluding 644,465,420?

 A: 708,912,004

Why is 708,912,004 the sum of all factors of 644,465,420, excluding 644,465,420?

The factors of the number 644,465,420 are: 1, 2, 4, 5, 10, 20, 32223271, 64446542, 128893084, 161116355, 322232710, 644465420.

If you add them up, you will get the total of 644,466,128. Now subtract 644,465,420 to get 708,912,004


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