Q: What is the sum of all factors of the number 639,560 excluding 639,560?
A: 829,240
The factors of the number 639,560 are: 1, 2, 4, 5, 8, 10, 20, 40, 59, 118, 236, 271, 295, 472, 542, 590, 1084, 1180, 1355, 2168, 2360, 2710, 5420, 10840, 15989, 31978, 63956, 79945, 127912, 159890, 319780, 639560.
If you add them up, you will get the total of 640,389. Now subtract 639,560 to get 829,240