GCF for 20 and 180

"Greatest Common Factor" Calculator

Greatest Common Factor of

and

What is the Greatest Common Divisor of 20 and 180?

Answer

GCF of 20 and 180 is 20

(Twenty)

Finding GCF for 20 and 180 using all factors (divisors) listing

The first method to find GCF for numbers 20 and 180 is to list all factors for both numbers and pick the highest common one:

All factors of 20: 1, 2, 4, 5, 10, 20

All factors of 180: 1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180

So the Greatest Common Factor for 20 and 180 is 20

Finding GCF for 20 and 180 by Prime Factorization

The second method to find GCF for numbers 20 and 180 is to list all Prime Factors for both numbers and multiply the common ones:

All Prime Factors of 20: 2, 2, 5

All Prime Factors of 180: 2, 2, 3, 3, 5

As we can see there are Prime Factors common to both numbers: 2, 2, 5

Now we need to multiply them to find GCF: 2 × 2 × 5 = 20

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About "Greatest Common Factor" Calculator

This calculator will help you find the greatest common factor (GCF) of two numbers. For example, it can help you find out what is the Greatest Common Divisor of 20 and 180? (The answer is: 20). Select the first number (e.g. '20') and the second number (e.g. '180'). After that hit the 'Calculate' button.
Greatest Common Factor (GCF) also known as the Greatest Common Divisor (GCD) or Highest Common Factor (HCF) - it is the largest positive integer that divides each of the integers with zero remainder.

"Greatest Common Factor" Calculator

Greatest Common Factor of

and

GCF Table

Number 1Number 2GCF
51805
61806
71801
81804
91809
1018010
111801
1218012
131801
141802
1518015
161804
171801
1818018
191801
2018020
211803
221802
231801
2418012
251805
261802
271809
281804
291801
3018030
311801
321804
331803
341802

FAQ

What is the Greatest Common Divisor of 20 and 180?

GCF of 20 and 180 is 20

How to find the GCF of 20 and 180?

You can find the GCF of 20 and 180 by listing all factors of both numbers and picking the greatest common one, or by prime factorization. The GCF of 20 and 180 is 20.

See Also