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GCF (HCF) of 4 and 8

"Greatest Common Factor" Calculator

What is the Greatest Common Divisor of 4 and 8?

Answer

GCF (HCF) of 4 and 8 is

4

Common factors: 1, 2, 4

4 divides 8 (8 ÷ 4 = 2), so the GCF is the smaller number itself.

4 = 2²

8 = 2³

Prime	4	8	Lowest power
2	2²	2³	2²

GCF = 2² = 4

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See Also

Least Common Multiple - Find the Least Common Multiple (LCM) of two numbers
Greatest Common Factor of 3 Numbers - Find the Greatest Common Factor (GCF) of three numbers
Least Common Multiple of 3 Numbers - Find the Least Common Multiple (LCM) of three numbers

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What is the GCF (HCF) of 4 and 8. The GCF of 4 and 8 is 4 — the biggest number that can divide both integers. Step-by-step GCF (GCD) calculation by factoring.

https://calculat.io/en/number/greatest-common-factor-of/4--8/generated.jpg

GCF Table

Number 1	Number 2	GCF
4	2	2
4	3	1
4	5	1
4	6	2
4	7	1
4	8	4
4	9	1
4	10	2
4	12	4
4	13	1
4	14	2
4	15	1
4	16	4
4	18	2
4	20	4
4	21	1
4	23	1
4	24	4
4	25	1
4	26	2
4	27	1
4	28	4
4	32	4
4	35	1
4	37	1
4	40	4
4	44	4
4	45	1
4	48	4
4	52	4

FAQ

What is the Greatest Common Divisor of 4 and 8?

GCF (HCF) of 4 and 8 is 4

How to find the GCF of 4 and 8?

You can find the GCF of 4 and 8 by listing all factors of both numbers and picking the greatest common one, or by prime factorization. The GCF of 4 and 8 is 4.

What prime factors do 4 and 8 share?

The prime factorizations of 4 and 8 have 2 × 2 in common, and multiplying those shared primes gives 4 — exactly the greatest common factor.

How does the GCF reduce the fraction 4/8?

Divide the numerator and the denominator by the GCF 4: 4 ÷ 4 = 1 and 8 ÷ 4 = 2. So 4/8 in lowest terms is 1/2.