GCF for 30 and 455

What is the Greatest Common Factor of 30 and 455?

Answer: GCF of 30 and 455 is 5

(Five)

Finding GCF for 30 and 455 using all factors (divisors) listing

The first method to find GCF for numbers 30 and 455 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 455: 1, 5, 7, 13, 35, 65, 91, 455

So the Greatest Common Factor for 30 and 455 is 5

Finding GCF for 30 and 455 by Prime Factorization

The second method to find GCF for numbers 30 and 455 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 455: 5, 7, 13

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 455

GCF Table

Number 1Number 2GCF
154555
164551
174551
184551
194551
204555
214557
224551
234551
244551
254555
2645513
274551
284557
294551
304555
314551
324551
334551
344551
3545535
364551
374551
384551
3945513
404555
414551
424557
434551
444551

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 455? (The answer is: 5). Select the first number (e.g. '30') and the second number (e.g. '455'). 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 455?

GCF of 30 and 455 is 5