Factors of 9 are 1, 3, and 9.
Factors of 26 are 1, 2, 13, and 26.
The GCF of 9 and 26 is 1, which is the only factor common to both given numbers.
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The greatest common factor (GCF) refers to a factor that is COMMON to two or more numbers. You have only one number in the question! The greatest factor of any number is itself.