GCF for 30 and 115

What is the Greatest Common Factor of 30 and 115?

Answer: GCF of 30 and 115 is 5

(Five)

Finding GCF for 30 and 115 using all factors (divisors) listing

The first method to find GCF for numbers 30 and 115 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 115: 1, 5, 23, 115

So the Greatest Common Factor for 30 and 115 is 5

Finding GCF for 30 and 115 by Prime Factorization

The second method to find GCF for numbers 30 and 115 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 115: 5, 23

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 115

GCF Table

Number 1Number 2GCF
151155
161151
171151
181151
191151
201155
211151
221151
2311523
241151
251155
261151
271151
281151
291151
301155
311151
321151
331151
341151
351155
361151
371151
381151
391151
401155
411151
421151
431151
441151

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 115? (The answer is: 5). Select the first number (e.g. '30') and the second number (e.g. '115'). 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 115?

GCF of 30 and 115 is 5