The **gcf of 56 and 72** is the largest positive integer that divides the numbers 56 and 72 without a remainder. Spelled out, it is the greatest common factor of 56 and 72. Here you can find the gcf of 56 and 72, along with a total of three methods for computing it. In addition, we have a calculator you should check out. Not only can it determine the gcf of 56 and 72, but also that of three or more integers including fifty-six and seventy-two for example. Keep reading to learn everything about the gcf (56,72) and the terms related to it.

## What is the GCF of 56 and 72

If you just want to know *what is the greatest common factor of 56 and 72*, it is **8**. Usually, this is written as

**gcf(56,72) = 8**

The gcf of 56 and 72 can be obtained like this:

- The factors of 56 are 56, 28, 14, 8, 7, 4, 2, 1.
- The factors of 72 are 72, 36, 24, 18, 12, 9, 8, 6, 4, 3, 2, 1.
- The
*common*factors of 56 and 72 are 8, 4, 2, 1, intersecting the two sets above. - In the intersection factors of 56 ∩ factors of 72 the
*greatest*element is 8. - Therefore, the
**greatest common factor of 56 and 72 is 8**.

Taking the above into account you also know how to find *all* the common factors of 56 and 72, not just the greatest. In the next section we show you how to calculate the gcf of fifty-six and seventy-two by means of two more methods.

## How to find the GCF of 56 and 72

The greatest common factor of 56 and 72 can be computed by using the least common multiple aka lcm of 56 and 72. This is the easiest approach:

Alternatively, the gcf of 56 and 72 can be found using the prime factorization of 56 and 72:

- The prime factorization of 56 is: 2 x 2 x 2 x 7
- The prime factorization of 72 is: 2 x 2 x 2 x 3 x 3
- The prime factors and multiplicities 56 and 72 have in common are: 2 x 2 x 2
- 2 x 2 x 2 is the gcf of 56 and 72
- gcf(56,72) = 8

In any case, the easiest way to compute the gcf of two numbers like 56 and 72 is by using our calculator below. Note that it can also compute the gcf of more than two numbers, separated by a comma. For example, enter 56,72. The calculation is conducted automatically.

## Use of GCF of 56 and 72

What is the greatest common factor of 56 and 72 used for? Answer: It is helpful for reducing fractions like 56 / 72. Just divide the nominator as well as the denominator by the gcf (56,72) to reduce the fraction to lowest terms.

$\frac{56}{72} = \frac{\frac{56}{8}}{\frac{72}{8}} = \frac{7}{9}$.

## Properties of GCF of 56 and 72

The most important properties of the gcf(56,72) are:

- Commutative property: gcf(56,72) = gcf(72,56)
- Associative property: gcf(56,72,n) = gcf(gcf(72,56),n) $\hspace{10px}n\hspace{3px}\epsilon\hspace{3px}\mathbb{Z}$

The associativity is particularly useful to get the gcf of three or more numbers; our calculator makes use of it.

To sum up, the gcf of 56 and 72 is 8. In common notation: gcf (56,72) = 8.

If you have been searching for gcf 56 and 72 or gcf 56 72 then you have come to the correct page, too. The same is the true if you typed gcf for 56 and 72 in your favorite search engine.

Note that you can find the greatest common factor of many integer pairs including fifty-six / seventy-two by using the search form in the sidebar of this page.

Questions and comments related to the gcf of 56 and 72 are really appreciated. Use the form below or send us a mail to get in touch.

Please hit the sharing buttons if our article about the greatest common factor of 56 and 72 has been useful to you, and make sure to bookmark our site.

Thanks for your visit.

## Leave a Reply