Q: What is the sum of all factors of the number 20,820,900 excluding 20,820,900?

A: 39,421,772

Why is 39,421,772 the sum of all factors of 20,820,900, excluding 20,820,900?

The factors of the number 20,820,900 are: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 25, 30, 50, 60, 75, 100, 150, 300, 69403, 138806, 208209, 277612, 347015, 416418, 694030, 832836, 1041045, 1388060, 1735075, 2082090, 3470150, 4164180, 5205225, 6940300, 10410450, 20820900.

If you add them up, you will get the total of 20,820,939. Now subtract 20,820,900 to get 39,421,772