Well I don't know !
Let's work on it together and find out:
The factors of 52 are 1, 2, 4, 13, 26, and 52 .
The factors of 4 are 1, 2, and 4.
The common factors (factors on both lists) are 1, 2, and 4 .
The biggest one of those is 4 .
Interesting fact:
If the smaller number is a factor of the bigger number,
then it's also the greatest common factor of both numbers.
Perfect example:
4 is a factor of 52, so 4 is the greatest common factor
of 4 and 52 .