The common factors are: 1, 3, 9.
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There cannot be a greatest common factor (GCF) of just one number. To be common there need to be at least two numbers. If you find all the factors of two or more numbers, and you find some factors are the same ("common"), then the largest of those common factors is the Greatest Common Factor.
All nonzero numbers have factors. Some numbers have some of the same factors as other numbers. These are called common factors. Some factors are positive numbers. Common factors which are positive numbers would be called positive common factors.
That's another term for common factors. All numbers have factors. Some numbers have some of the same factors as other numbers.
they are closely related, but GCF (greatest common factor) is the largest common factor between two or more numbers.
All integers have factors. Some integers have some of the same factors as other integers. These are known as common factors. The largest of these is known as the greatest common factor, or GCF.