GCF for 30 and 195

"Greatest Common Factor" Calculator

Greatest Common Factor of

and

What is the Greatest common Divisor of 30 and 195?

Answer: GCF of 30 and 195 is 15

(Fifteen)

Finding GCF for 30 and 195 using all factors (divisors) listing

The first method to find GCF for numbers 30 and 195 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 195: 1, 3, 5, 13, 15, 39, 65, 195

So the Greatest Common Factor for 30 and 195 is 15

Finding GCF for 30 and 195 by Prime Factorization

The second method to find GCF for numbers 30 and 195 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 195: 3, 5, 13

As we can see there are Prime Factors common to both numbers: 3, 5

Now we need to multiply them to find GCF: 3 × 5 = 15

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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 30 and 195? (The answer is: 15). Select the first number (e.g. '30') and the second number (e.g. '195'). 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
1519515
161951
171951
181953
191951
201955
211953
221951
231951
241953
251955
2619513
271953
281951
291951
3019515
311951
321951
331953
341951
351955
361953
371951
381951
3919539
401955
411951
421953
431951
441951

FAQ

What is the Greatest common Divisor of 30 and 195?

GCF of 30 and 195 is 15

See Also