Q: What is the sum of all factors of the number 12,123,111 excluding 12,123,111?

A: 9,803,801

Why is 9,803,801 the sum of all factors of 12,123,111, excluding 12,123,111?

The factors of the number 12,123,111 are: 1, 3, 7, 11, 13, 21, 33, 39, 77, 91, 121, 143, 231, 273, 363, 367, 429, 847, 1001, 1101, 1573, 2541, 2569, 3003, 4037, 4719, 4771, 7707, 11011, 12111, 14313, 28259, 33033, 33397, 44407, 52481, 84777, 100191, 133221, 157443, 310849, 367367, 577291, 932547, 1102101, 1731873, 4041037, 12123111.

If you add them up, you will get the total of 12,123,120. Now subtract 12,123,111 to get 9,803,801