Does anyone know the highest common factor (HCM) of 98 and 42

The factors of 98 are 98, 49, 14, 7, 2, 1.

The factors of 42 are 42, 21, 14, 7, 6, 3, 2, 1.

The common factors of 98 and 42 are 14, 7, 2, 1,

In the intersection numbers of 98 & factors of 42 the largest number is 14.

So, the greatest common factor of 98 and 42 is 14.