Q: What is the sum of all factors of the number 641,256,021 excluding 641,256,021?

 A: 453,517,131

Why is 453,517,131 the sum of all factors of 641,256,021, excluding 641,256,021?

The factors of the number 641,256,021 are: 1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 1130963, 3392889, 7916741, 10178667, 23750223, 30536001, 71250669, 91608003, 213752007, 641256021.

If you add them up, you will get the total of 641,256,474. Now subtract 641,256,021 to get 453,517,131


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