Q: What is the sum of all factors of the number 644,080 excluding 644,080?

A: 887,072

Why is 887,072 the sum of all factors of 644,080, excluding 644,080?

The factors of the number 644,080 are: 1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 83, 97, 166, 194, 332, 388, 415, 485, 664, 776, 830, 970, 1328, 1552, 1660, 1940, 3320, 3880, 6640, 7760, 8051, 16102, 32204, 40255, 64408, 80510, 128816, 161020, 322040, 644080.

If you add them up, you will get the total of 644,967. Now subtract 644,080 to get 887,072