The gcf of 55 and 87 is the largest positive integer that divides the numbers 55 and 87 without a remainder. Spelled out, it is the greatest common factor of 55 and 87. Here you can find the gcf of 55 and 87, along with a total of three methods for computing it.
What is the GCF of 55 and 87
If you just want to know what is the greatest common factor of 55 and 87, it is 1. Usually, this is written as
The gcf of 55 and 87 can be obtained like this:
- The factors of 55 are 55, 11, 5, 1.
- The factors of 87 are 87, 29, 3, 1.
- The common factors of 55 and 87 are 1, intersecting the two sets above.
- In the intersection factors of 55 ∩ factors of 87 the greatest element is 1.
- Therefore, the greatest common factor of 55 and 87 is 1.
Taking the above into account you also know how to find all the common factors of 55 and 87, not just the greatest. In the next section we show you how to calculate the gcf of fifty-five and eighty-seven by means of two more methods.
How to find the GCF of 55 and 87
The greatest common factor of 55 and 87 can be computed by using the least common multiple aka lcm of 55 and 87. This is the easiest approach:
Alternatively, the gcf of 55 and 87 can be found using the prime factorization of 55 and 87:
- The prime factorization of 55 is: 5 x 11
- The prime factorization of 87 is: 3 x 29
- The prime factors and multiplicities 55 and 87 have in common are: 1
- 1 is the gcf of 55 and 87
- gcf(55,87) = 1
In any case, the easiest way to compute the gcf of two numbers like 55 and 87 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 55,87. The calculation is conducted automatically.
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Use of GCF of 55 and 87
What is the greatest common factor of 55 and 87 used for? Answer: It is helpful for reducing fractions like 55 / 87. Just divide the nominator as well as the denominator by the gcf (55,87) to reduce the fraction to lowest terms.
Properties of GCF of 55 and 87
The most important properties of the gcf(55,87) are:
- Commutative property: gcf(55,87) = gcf(87,55)
- Associative property: gcf(55,87,n) = gcf(gcf(87,55),n)
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 55 and 87 is 1. In common notation: gcf (55,87) = 1.
If you have been searching for gcf 55 and 87 or gcf 55 87 then you have come to the correct page, too. The same is the true if you typed gcf for 55 and 87 in your favorite search engine.
Note that you can find the greatest common factor of many integer pairs including fifty-five / eighty-seven by using the search form in the sidebar of this page.
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