5427,29,3,23,3,3,2
54 27,2 9,3,2 3,3,3,2
'' 54'' '' ^'' ''6/9'' ''3-2/ 3-3''
Since 27 is a factor of 54, and 27 cannot have a larger factor than itself, the greatest common factor of 27 and 54 is 27.
The greatest common factor of 54 and 90 is 18.
5427,29,3,23,3,3,2
54 27,2 9,3,2 3,3,3,2
54 27,2 9,3,2 3,3,3,2
54 27,2 9,3,2 3,3,3,2
54 27,2 9,3,2 3,3,3,2
54 27,2 9,3,2 3,3,3,2
54 27,2 9,3,2 3,3,3,2
54 27,2 9,3,2 3,3,3,2
'' 54'' '' ^'' ''6/9'' ''3-2/ 3-3''
9 3,3 54 27,2 9,3,2 3,3,3,2
54/\27 2/\9 3/\3 32x3x3x3 or 2x33
As a product of its prime factors: 2*3*3*3 = 54