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To get the Greates Common Factor (GCF) of 3045 and 39 we need to factor each value first and then we choose all the copies of factors and multiply them:
|3045: ||3||5||7|| ||29|
|39: ||3|| || ||13|| |
|GCF: ||3|| || || || |
The Greates Common Factor (GCF) is: 3