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 27 and 216 is 27
The greatest common factor of 216 and 855 is 9.
There is neither a greatest common factor nor common factors of a single number, such as 216, because there cannot be any form of common factor without two or more numbers to compare. Common factors are factors that the numbers being compared have in common. The greatest common factor is the largest factor that all the numbers being compared have in common. Thus, since there are not two or more numbers to compare, there are neither common factors nor a greatest common factor. The factors of 216 are 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 27, 36, 54, 72, 108, and 216. Examples: The common factors of 30 and 216 are 1, 2, 3, and 6; the greatest common factor is 6. The common factors of 72 and 216 are 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, and 72; the greatest common factor is 72. The common factors of 91 and 216 are only 1; the greatest common factor is 1.
The greatest common factor of 27 and 36 is 9.
the greatest common factor for 27 and 32 is 1
The greatest common factor of 14 and 27 is 1.
The greatest common factor of 27 and 35 is 1
the greatest common factor of 243 and 54 is 27.
Since 27 is a factor of 54, and 27 cannot have a larger factor than itself, the greatest common factor of 27 and 54 is 27.
The greatest common factor is 1
The greatest common factor of 75 and 27 is 3.
The greatest common factor of 33, 27 & 39 is 3.
The GCF is 3.