Q: What is the sum of all factors of the number 311,320 excluding 311,320?

 A: 409,400

Why is 409,400 the sum of all factors of 311,320, excluding 311,320?

The factors of the number 311,320 are: 1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 181, 215, 344, 362, 430, 724, 860, 905, 1448, 1720, 1810, 3620, 7240, 7783, 15566, 31132, 38915, 62264, 77830, 155660, 311320.

If you add them up, you will get the total of 311,729. Now subtract 311,320 to get 409,400


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