Q: What is the sum of all factors of the number 409,820 excluding 409,820?
A: 479,908
The factors of the number 409,820 are: 1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 661, 1322, 2644, 3305, 6610, 13220, 20491, 40982, 81964, 102455, 204910, 409820.
If you add them up, you will get the total of 410,299. Now subtract 409,820 to get 479,908