**RESULT**

GCF(**42**, **84**) = **42**

**DESCRIPTIONS**

Prime factorization of 42 :

(**42** = **2** × **3** × **7**)

Prime factorization of 84 :

(**84** = **2** × **2** × **3** × **7**)

- 42 =
×__2__×__3____7__ - 84 =
× 2 ×__2__×__3____7__

The common prime factors of 42 and 84 are **2**, **3** and **7**. GCF is equal to the multiplication of those prime factors.

GCF(**42**, **84**) = **2** × **3** × **7** = **42**

The solution and descriptions above are generated by the GCF calculator. You can use the GCF calculator to see the greatest common factors of other numbers.

The greatest common factor (GCF) of two positive whole numbers is the largest number that divides these numbers exactly. GCF can be found by using the prime factorization method. It is equal to the product of all common prime factors in the factorization.

👉 Click here to see the GCF calculation of 42 and 84 using the cake method.

👉 Click here to see the LCM calculation of 42 and 84 using the cake method.

👉 Click here to see the LCM calculation of 42 and 84 using the prime factorization method.