GCF of 57 and 27


The gcf of 57 and 27 is the largest positive integer that divides the numbers 57 and 27 without a remainder. Spelled out, it is the greatest common factor of 57 and 27. Here you can find the gcf of 57 and 27, 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 57 and 27, but also that of three or more integers including fifty-seven and twenty-seven for example. Keep reading to learn everything about the gcf (57,27) and the terms related to it.

What is the GCF of 57 and 27

If you just want to know what is the greatest common factor of 57 and 27, it is 3. Usually, this is written as

gcf(57,27) = 3

The gcf of 57 and 27 can be obtained like this:

  • The factors of 57 are 57, 19, 3, 1.
  • The factors of 27 are 27, 9, 3, 1.
  • The common factors of 57 and 27 are 3, 1, intersecting the two sets above.
  • In the intersection factors of 57 ∩ factors of 27 the greatest element is 3.
  • Therefore, the greatest common factor of 57 and 27 is 3.

Taking the above into account you also know how to find all the common factors of 57 and 27, not just the greatest. In the next section we show you how to calculate the gcf of fifty-seven and twenty-seven by means of two more methods.

How to find the GCF of 57 and 27

The greatest common factor of 57 and 27 can be computed by using the least common multiple aka lcm of 57 and 27. This is the easiest approach:

gcf (57,27) = $\frac{57 \times 27}{lcm(57,27)} = \frac{1539}{513}$ = 3

Alternatively, the gcf of 57 and 27 can be found using the prime factorization of 57 and 27:

  • The prime factorization of 57 is: 3 x 19
  • The prime factorization of 27 is: 3 x 3 x 3
  • The prime factors and multiplicities 57 and 27 have in common are: 3
  • 3 is the gcf of 57 and 27
  • gcf(57,27) = 3

In any case, the easiest way to compute the gcf of two numbers like 57 and 27 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 57,27. The calculation is conducted automatically.

The gcf is...
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Use of GCF of 57 and 27

What is the greatest common factor of 57 and 27 used for? Answer: It is helpful for reducing fractions like 57 / 27. Just divide the nominator as well as the denominator by the gcf (57,27) to reduce the fraction to lowest terms.

$\frac{57}{27} = \frac{\frac{57}{3}}{\frac{27}{3}} = \frac{19}{9}$.

Properties of GCF of 57 and 27

The most important properties of the gcf(57,27) are:

  • Commutative property: gcf(57,27) = gcf(27,57)
  • Associative property: gcf(57,27,n) = gcf(gcf(27,57),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 57 and 27 is 3. In common notation: gcf (57,27) = 3.

If you have been searching for gcf 57 and 27 or gcf 57 27 then you have come to the correct page, too. The same is the true if you typed gcf for 57 and 27 in your favorite search engine.

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

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