GCF for 30 and 185

What is the Greatest Common Factor of 30 and 185?

Answer: GCF of 30 and 185 is 5

(Five)

Finding GCF for 30 and 185 using all factors (divisors) listing

The first method to find GCF for numbers 30 and 185 is to list all factors for both numbers and pick the highest common one:

All factors of 30: 1, 2, 3, 5, 6, 10, 15, 30

All factors of 185: 1, 5, 37, 185

So the Greatest Common Factor for 30 and 185 is 5

Finding GCF for 30 and 185 by Prime Factorization

The second method to find GCF for numbers 30 and 185 is to list all Prime Factors for both numbers and multiply the common ones:

All Prime Factors of 30: 2, 3, 5

All Prime Factors of 185: 5, 37

As we can see there is only one Prime Factor common to both numbers. It is 5

So 5 is the Greatest Common Factor of 30 and 185

GCF Table

Number 1Number 2GCF
151855
161851
171851
181851
191851
201855
211851
221851
231851
241851
251855
261851
271851
281851
291851
301855
311851
321851
331851
341851
351855
361851
3718537
381851
391851
401855
411851
421851
431851
441851

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 Factor of 30 and 185? (The answer is: 5). Select the first number (e.g. '30') and the second number (e.g. '185'). 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

FAQ

What is the Greatest Common Factor of 30 and 185?

GCF of 30 and 185 is 5