Q: What is the sum of all factors of the number 679,905 excluding 679,905?

 A: 541,575

Why is 541,575 the sum of all factors of 679,905, excluding 679,905?

The factors of the number 679,905 are: 1, 3, 5, 9, 15, 29, 45, 87, 145, 261, 435, 521, 1305, 1563, 2605, 4689, 7815, 15109, 23445, 45327, 75545, 135981, 226635, 679905.

If you add them up, you will get the total of 680,446. Now subtract 679,905 to get 541,575


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