Q: What is the sum of all factors of the number 640,280 excluding 640,280?
A: 800,440
The factors of the number 640,280 are: 1, 2, 4, 5, 8, 10, 20, 40, 16007, 32014, 64028, 80035, 128056, 160070, 320140, 640280.
If you add them up, you will get the total of 641,080. Now subtract 640,280 to get 800,440