Q: What is the sum of all factors of the number 671,240 excluding 671,240?

 A: 863,440

Why is 863,440 the sum of all factors of 671,240, excluding 671,240?

The factors of the number 671,240 are: 1, 2, 4, 5, 8, 10, 20, 40, 97, 173, 194, 346, 388, 485, 692, 776, 865, 970, 1384, 1730, 1940, 3460, 3880, 6920, 16781, 33562, 67124, 83905, 134248, 167810, 335620, 671240.

If you add them up, you will get the total of 672,103. Now subtract 671,240 to get 863,440


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