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GCF of 2 and 18 (Greatest Common Factor)

"Greatest Common Factor" Calculator

What is the Greatest Common Divisor of 2 and 18?

Answer

GCF of 2 and 18 is

(Two)

Finding GCF for 2 and 18 using all factors (divisors) listing

The first method to find GCF for numbers 2 and 18 is to list all factors for both numbers and pick the highest common one:

All factors of 2: 1, 2

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

So the Greatest Common Factor for 2 and 18 is 2

Finding GCF for 2 and 18 by Prime Factorization

The second method to find GCF for numbers 2 and 18 is to list all Prime Factors for both numbers and multiply the common ones:

All Prime Factors of 2: 2

All Prime Factors of 18: 2, 3, 3

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 2 and 18

Found an error in the calculation or the information?

Related Calculations

GCF Table

Number 1	Number 2	GCF
2	3	1
2	4	2
2	5	1
2	6	2
2	7	1
2	8	2
2	9	1
2	10	2
2	11	1
2	12	2
2	13	1
2	14	2
2	15	1
2	16	2
2	17	1
2	18	2
2	20	2
2	21	1
2	22	2
2	24	2
2	25	1
2	26	2
2	27	1
2	28	2
2	30	2
2	31	1
2	34	2
2	36	2
2	38	2
2	41	1

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 2 and 18? (The answer is: 2). Select the first number (e.g. '2') and the second number (e.g. '18'). 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

FAQ

What is the Greatest Common Divisor of 2 and 18?

GCF of 2 and 18 is 2

How to find the GCF of 2 and 18?

You can find the GCF of 2 and 18 by listing all factors of both numbers and picking the greatest common one, or by prime factorization. The GCF of 2 and 18 is 2.

What prime factors do 2 and 18 share?

The prime factorizations of 2 and 18 have 2 in common, and multiplying those shared primes gives 2 — exactly the greatest common factor.

How does the GCF reduce the fraction 2/18?

Divide the numerator and the denominator by the GCF 2: 2 ÷ 2 = 1 and 18 ÷ 2 = 9. So 2/18 in lowest terms is 1/9.

GCF of 2 and 18 (Greatest Common Factor)

What is the Greatest Common Divisor of 2 and 18?

Finding GCF for 2 and 18 using all factors (divisors) listing

Finding GCF for 2 and 18 by Prime Factorization

Related Calculations

See Also

GCF Table

About "Greatest Common Factor" Calculator

FAQ

What is the Greatest Common Divisor of 2 and 18?

How to find the GCF of 2 and 18?

What prime factors do 2 and 18 share?

How does the GCF reduce the fraction 2/18?

See Also

Number 1	Number 2	GCF
2	3	1
2	4	2
2	5	1
2	6	2
2	7	1
2	8	2
2	9	1
2	10	2
2	11	1
2	12	2
2	13	1
2	14	2
2	15	1
2	16	2
2	17	1
2	18	2
2	20	2
2	21	1
2	22	2
2	24	2
2	25	1
2	26	2
2	27	1
2	28	2
2	30	2
2	31	1
2	34	2
2	36	2
2	38	2
2	41	1

Number 1	Number 2	GCF
2	3	1
2	4	2
2	5	1
2	6	2
2	7	1
2	8	2
2	9	1
2	10	2
2	11	1
2	12	2
2	13	1
2	14	2
2	15	1
2	16	2
2	17	1
2	18	2
2	20	2
2	21	1
2	22	2
2	24	2
2	25	1
2	26	2
2	27	1
2	28	2
2	30	2
2	31	1
2	34	2
2	36	2
2	38	2
2	41	1

Number 1	Number 2	GCF
2	3	1
2	4	2
2	5	1
2	6	2
2	7	1
2	8	2
2	9	1
2	10	2
2	11	1
2	12	2
2	13	1
2	14	2
2	15	1
2	16	2
2	17	1
2	18	2
2	20	2
2	21	1
2	22	2
2	24	2
2	25	1
2	26	2
2	27	1
2	28	2
2	30	2
2	31	1
2	34	2
2	36	2
2	38	2
2	41	1