GCF for 15 and 27

"Greatest Common Factor" Calculator

Greatest Common Factor of

and

What is the Greatest common Divisor of 15 and 27?

Answer: GCF of 15 and 27 is 3

(Three)

Finding GCF for 15 and 27 using all factors (divisors) listing

The first method to find GCF for numbers 15 and 27 is to list all factors for both numbers and pick the highest common one:

All factors of 15: 1, 3, 5, 15

All factors of 27: 1, 3, 9, 27

So the Greatest Common Factor for 15 and 27 is 3

Finding GCF for 15 and 27 by Prime Factorization

The second method to find GCF for numbers 15 and 27 is to list all Prime Factors for both numbers and multiply the common ones:

All Prime Factors of 15: 3, 5

All Prime Factors of 27: 3, 3, 3

As we can see there is only one Prime Factor common to both numbers. It is 3

So 3 is the Greatest Common Factor of 15 and 27

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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 15 and 27? (The answer is: 3). Select the first number (e.g. '15') and the second number (e.g. '27'). 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
1271
2271
3273
4271
5271
6273
7271
8271
9279
10271
11271
12273
13271
14271
15273
16271
17271
18279
19271
20271
21273
22271
23271
24273
25271
26271
272727
28271
29271
30273

FAQ

What is the Greatest common Divisor of 15 and 27?

GCF of 15 and 27 is 3

See Also