Q: What is the sum of all factors of the number 421,205,217 excluding 421,205,217?

 A: 145,784,415

Why is 145,784,415 the sum of all factors of 421,205,217, excluding 421,205,217?

The factors of the number 421,205,217 are: 1, 3, 131, 393, 977, 1097, 2931, 3291, 127987, 143707, 383961, 431121, 1071769, 3215307, 140401739, 421205217.

If you add them up, you will get the total of 421,205,362. Now subtract 421,205,217 to get 145,784,415


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