Greatest Common Factor (GCF) of 123 and 646

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To get the Greates Common Factor (GCF) of 123 and 646 we need to factor each value first and then we choose all the copies of factors and multiply them:

123:    3  41
646:   2 1719 
GCF:        

The Greates Common Factor (GCF) is:   1

 

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