Q: What is the sum of all factors of the number 397,420 excluding 397,420?

 A: 465,428

Why is 465,428 the sum of all factors of 397,420, excluding 397,420?

The factors of the number 397,420 are: 1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 641, 1282, 2564, 3205, 6410, 12820, 19871, 39742, 79484, 99355, 198710, 397420.

If you add them up, you will get the total of 397,885. Now subtract 397,420 to get 465,428


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