GCF of 36 and 45


The gcf of 36 and 45 is the largest positive integer that divides the numbers 36 and 45 without a remainder. Spelled out, it is the greatest common factor of 36 and 45. Here you can find the gcf of 36 and 45, 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 36 and 45, but also that of three or more integers including thirty-six and forty-five for example. Keep reading to learn everything about the gcf (36,45) and the terms related to it.

What is the GCF of 36 and 45

If you just want to know what is the greatest common factor of 36 and 45, it is 9. Usually, this is written as

gcf(36,45) = 9

The gcf of 36 and 45 can be obtained like this:

  • The factors of 36 are 36, 18, 12, 9, 6, 4, 3, 2, 1.
  • The factors of 45 are 45, 15, 9, 5, 3, 1.
  • The common factors of 36 and 45 are 9, 3, 1, intersecting the two sets above.
  • In the intersection factors of 36 ∩ factors of 45 the greatest element is 9.
  • Therefore, the greatest common factor of 36 and 45 is 9.

Taking the above into account you also know how to find all the common factors of 36 and 45, not just the greatest. In the next section we show you how to calculate the gcf of thirty-six and forty-five by means of two more methods.

How to find the GCF of 36 and 45

The greatest common factor of 36 and 45 can be computed by using the least common multiple aka lcm of 36 and 45. This is the easiest approach:

gcf (36,45) = $\frac{36 \times 45}{lcm(36,45)} = \frac{1620}{180}$ = 9

Alternatively, the gcf of 36 and 45 can be found using the prime factorization of 36 and 45:

  • The prime factorization of 36 is: 2 x 2 x 3 x 3
  • The prime factorization of 45 is: 3 x 3 x 5
  • The prime factors and multiplicities 36 and 45 have in common are: 3 x 3
  • 3 x 3 is the gcf of 36 and 45
  • gcf(36,45) = 9

In any case, the easiest way to compute the gcf of two numbers like 36 and 45 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 36,45. The calculation is conducted automatically.

The gcf is...
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Use of GCF of 36 and 45

What is the greatest common factor of 36 and 45 used for? Answer: It is helpful for reducing fractions like 36 / 45. Just divide the nominator as well as the denominator by the gcf (36,45) to reduce the fraction to lowest terms.

$\frac{36}{45} = \frac{\frac{36}{9}}{\frac{45}{9}} = \frac{4}{5}$.

Properties of GCF of 36 and 45

The most important properties of the gcf(36,45) are:

  • Commutative property: gcf(36,45) = gcf(45,36)
  • Associative property: gcf(36,45,n) = gcf(gcf(45,36),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 36 and 45 is 9. In common notation: gcf (36,45) = 9.

If you have been searching for gcf 36 and 45 or gcf 36 45 then you have come to the correct page, too. The same is the true if you typed gcf for 36 and 45 in your favorite search engine.

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

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