Find the greatest common factor of 33 and 44.

The factors of a number are values that divide evenly into that number. For example, the factors of 4 are 1, 2, and 4 because 4 can be divided by each without producing a remainder. To determine the greatest common factor of 33 and 44, begin by listing the factors of each number:
Factors of 33 are: 1, 3, 11, 33
Factors of 44 are: 1, 2, 4, 11, 22, 44
The greatest common factor is the largest number that is in both lists of factors: 11.