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To get the Greates Common Factor (GCF) of 1365 and 531 we need to factor each value first and then we choose all the copies of factors and multiply them:
|1365: ||3|| ||5||7||13|| |
|531: ||3||3|| || || ||59|
|GCF: ||3|| || || || || |
The Greates Common Factor (GCF) is: 3