1, 2, 3, 6, 8, 9, 12, 36, and 72
http://wiki.answers.com/Q/What_are_all_of_the_fact...

The factors of 72 are 1,72, 2, 36, 3, 24, 4, 18, 6, 12, 8, and
http://www.chacha.com/question/whatareallthefa...

Answer: The greatest common factor (GCF) of 27 and 72 is 9. The common factors of 27 and 72 are 1, 3, and 9. Definition: A factor is a divisor  a number that will evenly divide into
http://wiki.answers.com/Q/What_is_the_greatest_com...

The GCF of 72 and 78 is 6.
http://wiki.answers.com/Q/What_is_the_greatest_com...
