12.
The factors are 1 & 11 !
5 and 6 are factors of 30 that, when added together, provide a sum of 11.
11 and 1
54 Factors of 54 are 2,3,3,3 (54=2x33). Sum of the factors is 11=2+3+3+3.
4 and 7
4 and 7
4 & 7
5 and 6
The factors of 13 are 1 and 13. They do not total 11.
1 + 11 + 191 + 2101 = 2,304
1 + 3 + 9 + 11 + 33 + 99 = 156
1 + 5 + 11 + 55 + 121 + 605 = 798