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To get the Greates Common Factor (GCF) of 87480 and 27216 we need to factor each value first and then we choose all the copies of factors and multiply them:
|87480: ||2||2||2|| ||3||3||3||3||3||3||3||5|| |
|27216: ||2||2||2||2||3||3||3||3||3|| || || ||7|
|GCF: ||2||2||2|| ||3||3||3||3||3|| || || || |
The Greates Common Factor (GCF) is: 2 x 2 x 2 x 3 x 3 x 3 x 3 x 3 = 1944