No, 4 is not a factor of 18.
The greatest common factor of 16, 24, and 18 is 2.
The GCF is: 2
The GCF of 16, 18, and 36 is 2.
The greatest common factor of the numbers 12, 16 and 18 is 2.
The GCF of 16, 18, and 8 is 2.
The GCF is 2.
The GCF is 2.
The GCF is 2.
The GCF is 2.
The greatest common factor is 18.
The greatest common factor of 18 and 55 is 1.