Q: What is the sum of all factors of the number 978,399 excluding 978,399?
A: 520,065
The factors of the number 978,399 are: 1, 3, 9, 27, 47, 81, 141, 257, 423, 771, 1269, 2313, 3807, 6939, 12079, 20817, 36237, 108711, 326133, 978399.
If you add them up, you will get the total of 978,919. Now subtract 978,399 to get 520,065