Q: What is the sum of all factors of the number 668,440 excluding 668,440?

 A: 925,640

Why is 925,640 the sum of all factors of 668,440, excluding 668,440?

The factors of the number 668,440 are: 1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680, 983, 1966, 3932, 4915, 7864, 9830, 16711, 19660, 33422, 39320, 66844, 83555, 133688, 167110, 334220, 668440.

If you add them up, you will get the total of 669,365. Now subtract 668,440 to get 925,640


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