Q: What is the sum of all factors of the number 120,640 excluding 120,640?

 A: 199,400

Why is 199,400 the sum of all factors of 120,640, excluding 120,640?

The factors of the number 120,640 are: 1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 29, 32, 40, 52, 58, 64, 65, 80, 104, 116, 130, 145, 160, 208, 232, 260, 290, 320, 377, 416, 464, 520, 580, 754, 832, 928, 1040, 1160, 1508, 1856, 1885, 2080, 2320, 3016, 3770, 4160, 4640, 6032, 7540, 9280, 12064, 15080, 24128, 30160, 60320, 120640.

If you add them up, you will get the total of 120,839. Now subtract 120,640 to get 199,400


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