Common factor and greatest common factor, fourth grade mathematics of Hebei Education Press, Volume II.

The greatest common divisor generally means the greatest common divisor. The greatest common factor, also known as the greatest common factor and the greatest common factor, refers to the largest divisor of two or more integers. The greatest common divisor of a and b is (a, b). Similarly, the greatest common divisor of a, b and c is (a, b, c), and the greatest common divisor of multiple integers has the same symbol.