Q: What is the sum of all factors of the number 305,320 excluding 305,320?

 A: 423,680

Why is 423,680 the sum of all factors of 305,320, excluding 305,320?

The factors of the number 305,320 are: 1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 449, 680, 898, 1796, 2245, 3592, 4490, 7633, 8980, 15266, 17960, 30532, 38165, 61064, 76330, 152660, 305320.

If you add them up, you will get the total of 305,743. Now subtract 305,320 to get 423,680


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