The GCF is 4.
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The Greatest Common Factor (GCF) of 4, 16, and 20 is 4.
lcm(16, 20) is 80.There is NO greatest common multiple, for whatever multiple of their LCM you give, I can always add another 80 and get an even greater common multiple.Mefinx you meant their greatest common FACTOR, which is 4.
The GCF is: 20
The greatest common factor is 2 and the least common multiple is also 2.
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.