GCF for 16, 20 and 27

"Greatest Common Factor of 3 Numbers" Calculator

What's the Greatest Common Factor (GCF) of 16, 20 and 27?

Answer

GCF of 16, 20 and 27 is

Common factors: 1

Only 1 divides all three: no prime is a factor of each of 16, 20 and 27.

Pairs do share factors — GCF(16, 20) = 4 — just none greater than 1 common to all three.

16 = 2⁴

20 = 2² × 5

27 = 3³

Prime	16	20	27	Lowest power
2	2⁴	2²	—	—
3	—	—	3³	—
5	—	5	—	—

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

GCF = 1

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Related Calculations

GCF Table

1st	2nd	3rd	GCF
12	16	20	4
13	16	20	1
14	16	20	2
15	16	20	1
16	16	20	4
16	17	20	1
16	18	20	2
16	19	20	1
16	20	20	4
16	20	21	1
16	20	22	2
16	20	23	1
16	20	24	4
16	20	25	1
16	20	26	2
16	20	27	1
16	20	28	4
16	20	29	1
16	20	30	2
16	20	31	1
16	20	32	4
16	20	33	1
16	20	34	2
16	20	35	1
16	20	36	4
16	20	37	1
16	20	38	2
16	20	39	1
16	20	40	4
16	20	41	1

FAQ

What's the Greatest Common Factor (GCF) of 16, 20 and 27?

GCF of 16, 20 and 27 is 1

What prime factors do 16, 20 and 27 share?

None at all: 16, 20 and 27 have no prime factor in common, so the only positive integer dividing all three is 1 and their GCF is 1.

Can you get the GCF of 16, 20 and 27 two numbers at a time?

Yes. The GCF of 16 and 20 is 4, and the GCF of 4 and 27 is 1 — the same answer, because the greatest common factor is associative and does not depend on the order of the three numbers.

How does the GCF simplify the ratio 16 : 20 : 27?

Divide every term by the GCF 1: 16 ÷ 1 = 16, 20 ÷ 1 = 20 and 27 ÷ 1 = 27. So 16 : 20 : 27 in lowest terms is 16 : 20 : 27, and no whole number other than 1 divides all three of those.

GCF for 16, 20 and 27

What's the Greatest Common Factor (GCF) of 16, 20 and 27?

More with these numbers

Related Calculations

See Also

GCF Table

FAQ

What's the Greatest Common Factor (GCF) of 16, 20 and 27?

What prime factors do 16, 20 and 27 share?

Can you get the GCF of 16, 20 and 27 two numbers at a time?

How does the GCF simplify the ratio 16 : 20 : 27?

See Also

1st	2nd	3rd	GCF
12	16	20	4
13	16	20	1
14	16	20	2
15	16	20	1
16	16	20	4
16	17	20	1
16	18	20	2
16	19	20	1
16	20	20	4
16	20	21	1
16	20	22	2
16	20	23	1
16	20	24	4
16	20	25	1
16	20	26	2
16	20	27	1
16	20	28	4
16	20	29	1
16	20	30	2
16	20	31	1
16	20	32	4
16	20	33	1
16	20	34	2
16	20	35	1
16	20	36	4
16	20	37	1
16	20	38	2
16	20	39	1
16	20	40	4
16	20	41	1

1st	2nd	3rd	GCF
12	16	20	4
13	16	20	1
14	16	20	2
15	16	20	1
16	16	20	4
16	17	20	1
16	18	20	2
16	19	20	1
16	20	20	4
16	20	21	1
16	20	22	2
16	20	23	1
16	20	24	4
16	20	25	1
16	20	26	2
16	20	27	1
16	20	28	4
16	20	29	1
16	20	30	2
16	20	31	1
16	20	32	4
16	20	33	1
16	20	34	2
16	20	35	1
16	20	36	4
16	20	37	1
16	20	38	2
16	20	39	1
16	20	40	4
16	20	41	1

1st	2nd	3rd	GCF
12	16	20	4
13	16	20	1
14	16	20	2
15	16	20	1
16	16	20	4
16	17	20	1
16	18	20	2
16	19	20	1
16	20	20	4
16	20	21	1
16	20	22	2
16	20	23	1
16	20	24	4
16	20	25	1
16	20	26	2
16	20	27	1
16	20	28	4
16	20	29	1
16	20	30	2
16	20	31	1
16	20	32	4
16	20	33	1
16	20	34	2
16	20	35	1
16	20	36	4
16	20	37	1
16	20	38	2
16	20	39	1
16	20	40	4
16	20	41	1