It is not possible to give a sensible answer to this question. 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!
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You need at least two numbers to find a GCF.
If that's 367 and 248, the GCF is 1.
If that's 36, 72 and 48, the GCF is 12.