GCF for 18 and 38

"Greatest Common Factor" Calculator

Greatest Common Factor of

and

What is the Greatest common Divisor of 18 and 38?

Answer: GCF of 18 and 38 is 2

(Two)

Finding GCF for 18 and 38 using all factors (divisors) listing

The first method to find GCF for numbers 18 and 38 is to list all factors for both numbers and pick the highest common one:

All factors of 18: 1, 2, 3, 6, 9, 18

All factors of 38: 1, 2, 19, 38

So the Greatest Common Factor for 18 and 38 is 2

Finding GCF for 18 and 38 by Prime Factorization

The second method to find GCF for numbers 18 and 38 is to list all Prime Factors for both numbers and multiply the common ones:

All Prime Factors of 18: 2, 3, 3

All Prime Factors of 38: 2, 19

As we can see there is only one Prime Factor common to both numbers. It is 2

So 2 is the Greatest Common Factor of 18 and 38

Related Calculations

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 18 and 38? (The answer is: 2). Select the first number (e.g. '18') and the second number (e.g. '38'). 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
3381
4382
5381
6382
7381
8382
9381
10382
11381
12382
13381
14382
15381
16382
17381
18382
193819
20382
21381
22382
23381
24382
25381
26382
27381
28382
29381
30382
31381
32382

FAQ

What is the Greatest common Divisor of 18 and 38?

GCF of 18 and 38 is 2

See Also