The negative greatest common factor is a meaningless term because it would always be -1.
In this case, the GCF is 5.
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The greatest common factor of 45 and 225 is 15.The GCF is: 45
The greatest common factor of 26 and 45 is 1.
The greatest common factor of 90 , 30 , 45 = 15
The greatest common factor of 8 and 45 is 1. The numbers 8 and 45 have no prime factors in common.
45 is the greatest common factor of 90 and 135.The GCF is 45.