Q: What is the sum of all factors of the number 399,320 including 399,320?
A: 918,000
The factors of the number 399,320 are: 1, 2, 4, 5, 8, 10, 20, 40, 67, 134, 149, 268, 298, 335, 536, 596, 670, 745, 1192, 1340, 1490, 2680, 2980, 5960, 9983, 19966, 39932, 49915, 79864, 99830, 199660, 399320.
If you add them up, you will get the total of 918,000.