Q: What is the sum of all factors of the number 398,440 including 398,440?
A: 1,025,280
The factors of the number 398,440 are: 1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 1423, 2846, 5692, 7115, 9961, 11384, 14230, 19922, 28460, 39844, 49805, 56920, 79688, 99610, 199220, 398440.
If you add them up, you will get the total of 1,025,280.