1 x 144  2 x 72  3 x 48  4 x 36  6 x 24  8 x 18  9 x 16  12 x 12.
http://wiki.answers.com/Q/What_are_the_factor_pair...

The greatest common factor of 126 and 144 is 18.
http://wiki.answers.com/Q/The_greatest_common_fact...

A factor is a divisor  a number that will evenly divide into another number. The greatest common factor of two or more numbers is the largest factor that both numbers have in common
http://wiki.answers.com/Q/What_is_the_GCF_of_144_a...

2448.
http://wiki.answers.com/Q/What_is_the_greatest_com...
