What is the greatest common factor of 8m?

The greatest common factor of 8m is 8.

When finding the greatest common factor of an expression like 8m, we look for the largest number (or variable) that can evenly divide into both the coefficient (in this case, 8) and the variable (in this case, m). In this case, the greatest common factor of 8m is 8 because it is the largest number that can divide into both 8 and m.

Therefore, the greatest common factor of 8m is 8.