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GCF (HCF) of 16 and 43

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What is the Greatest Common Divisor of 16 and 43?

Answer

GCF (HCF) of 16 and 43 is

1

Common factors: 1

Only 1 divides both: 16 and 43 share no prime factor.

Such numbers are called coprime (relatively prime); their LCM is just the product: 16 × 43 = 688.

16 = 2⁴

43 — prime

Prime	16	43	Lowest power
2	2⁴	—	—
43	—	43	—

— = power 0: the prime is not a factor of this number, so it cannot be in the GCF.

GCF = 1

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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 16 and 43. The GCF of 16 and 43 is 1 — the biggest number that can divide both integers. Step-by-step GCF (GCD) calculation by factoring.

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GCF Table

Number 1	Number 2	GCF
16	24	8
16	25	1
16	26	2
16	27	1
16	28	4
16	30	2
16	32	16
16	33	1
16	34	2
16	35	1
16	36	4
16	38	2
16	39	1
16	40	8
16	42	2
16	43	1
16	44	4
16	45	1
16	46	2
16	48	16
16	49	1
16	50	2
16	53	1
16	55	1
16	56	8
16	58	2
16	60	4
16	64	16
16	72	8
16	80	16

FAQ

What is the Greatest Common Divisor of 16 and 43?

GCF (HCF) of 16 and 43 is 1

How to find the GCF of 16 and 43?

You can find the GCF of 16 and 43 by listing all factors of both numbers and picking the greatest common one, or by prime factorization. The GCF of 16 and 43 is 1.

What prime factors do 16 and 43 share?

16 and 43 have no prime factor in common, so the only integer that divides both of them is 1 and their GCF is 1.

How does the GCF reduce the fraction 16/43?

Divide the numerator and the denominator by the GCF 1: 16 ÷ 1 = 16 and 43 ÷ 1 = 43. So 16/43 in lowest terms is 16/43.

Are 16 and 43 coprime?

Yes, 16 and 43 are coprime (relatively prime) because their Greatest Common Factor is 1.