The correct option is C 26
To find the least common multiple
List out the multiples of 2, 13, 26
Multiples of 2 = 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 24, 26, 28 , ...
Multiples of 13 = 13, 26 , 39, 52, ....
Multiples of 26 = 26, 52, ....
As we can see 26 is the least common multiple.