Q: What is the sum of all factors of the number 257,840 excluding 257,840?
A: 398,368
The factors of the number 257,840 are: 1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 293, 440, 586, 880, 1172, 1465, 2344, 2930, 3223, 4688, 5860, 6446, 11720, 12892, 16115, 23440, 25784, 32230, 51568, 64460, 128920, 257840.
If you add them up, you will get the total of 258,238. Now subtract 257,840 to get 398,368