Q: What is the sum of all factors of the number 401,980 including 401,980?
A: 856,800
The factors of the number 401,980 are: 1, 2, 4, 5, 10, 20, 101, 199, 202, 398, 404, 505, 796, 995, 1010, 1990, 2020, 3980, 20099, 40198, 80396, 100495, 200990, 401980.
If you add them up, you will get the total of 856,800.