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The factors of 105 are: 1, 3, 5, 7, 15, 21, 35, 105
The factors of 135 are: 1, 3, 5, 9, 15, 27, 45, 135
The factors of 225 are: 1, 3, 5, 9, 15, 25, 45, 75, 225
The common factors are: 1, 3, 5, 15
For 225, 135, 105 the LCM is: 4,725
The GCF is 45.
The GCF is 15.
The GCF is 105.