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To get the Greates Common Factor (GCF) of 1911 and 20027 we need to factor each value first and then we choose all the copies of factors and multiply them:
|1911: ||3||7||7||13|| |
|20027: || ||7|| || ||2861|
|GCF: || ||7|| || || |
The Greates Common Factor (GCF) is: 7