Q: What is the sum of all factors of the number 326,640 excluding 326,640?

A: 686,688

Why is 686,688 the sum of all factors of 326,640, excluding 326,640?

The factors of the number 326,640 are: 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 240, 1361, 2722, 4083, 5444, 6805, 8166, 10888, 13610, 16332, 20415, 21776, 27220, 32664, 40830, 54440, 65328, 81660, 108880, 163320, 326640.

If you add them up, you will get the total of 327,326. Now subtract 326,640 to get 686,688