Q: What is the sum of all factors of the number 639,018 excluding 639,018?
A: 761,238
The factors of the number 639,018 are: 1, 2, 3, 6, 9, 18, 131, 262, 271, 393, 542, 786, 813, 1179, 1626, 2358, 2439, 4878, 35501, 71002, 106503, 213006, 319509, 639018.
If you add them up, you will get the total of 639,779. Now subtract 639,018 to get 761,238