The greatest common factor is a function of two numbers-- it is the greatest factor
that the numbers have in common. The concept does not apply to a single number.
Now you can use the same number twice and ask what is the greatest common factor of
240 and 240 and the answer would be 240.
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60
The GCF is 40.
The greatest common factor (GCF) is often also called the greatest common divisor (GCD) or highest common factor (HCF). Keep in mind that these different terms all refer to the same thing: the largest integer which evenly divides two or more numbers.The greatest common factor of 57 and 240 is 3.
The GCF of 375, 240, and 125 is 5.