What is the GCF of 6, 12 and 18?

What's the Greatest Common Factor (GCF) of 6, 12 and 18?

Answer

GCF of 6, 12 and 18 is

6

Common factors: 1, 2, 3, 6

6 divides all three: 6 ÷ 6 = 1, 12 ÷ 6 = 2, 18 ÷ 6 = 3 — and 1, 2 and 3 have no factor but 1 common to all of them, so no larger number divides all three.

6 = 2 × 3

12 = 2² × 3

18 = 2 × 3²

Prime	6	12	18	Lowest power
2	2	2²	2	2
3	3	3	3²	3

GCF = 2 × 3 = 6

More with these numbers

Related Calculations

GCF Table

1st	2nd	3rd	GCF
3	6	12	3
4	6	12	2
5	6	12	1
6	6	12	6
6	7	12	1
6	8	12	2
6	9	12	3
6	10	12	2
6	11	12	1
6	12	12	6
6	12	13	1
6	12	14	2
6	12	15	3
6	12	16	2
6	12	17	1
6	12	18	6
6	12	19	1
6	12	20	2
6	12	21	3
6	12	22	2
6	12	23	1
6	12	24	6
6	12	25	1
6	12	26	2
6	12	27	3
6	12	28	2
6	12	29	1
6	12	30	6
6	12	31	1
6	12	32	2

GCF for 6, 12 and 18

What's the Greatest Common Factor (GCF) of 6, 12 and 18?

More with these numbers

Related Calculations

See Also

GCF Table

FAQ

What's the Greatest Common Factor (GCF) of 6, 12 and 18?

What prime factors do 6, 12 and 18 share?

Can you get the GCF of 6, 12 and 18 two numbers at a time?

How does the GCF simplify the ratio 6 : 12 : 18?

See Also

1st	2nd	3rd	GCF
3	6	12	3
4	6	12	2
5	6	12	1
6	6	12	6
6	7	12	1
6	8	12	2
6	9	12	3
6	10	12	2
6	11	12	1
6	12	12	6
6	12	13	1
6	12	14	2
6	12	15	3
6	12	16	2
6	12	17	1
6	12	18	6
6	12	19	1
6	12	20	2
6	12	21	3
6	12	22	2
6	12	23	1
6	12	24	6
6	12	25	1
6	12	26	2
6	12	27	3
6	12	28	2
6	12	29	1
6	12	30	6
6	12	31	1
6	12	32	2

1st	2nd	3rd	GCF
3	6	12	3
4	6	12	2
5	6	12	1
6	6	12	6
6	7	12	1
6	8	12	2
6	9	12	3
6	10	12	2
6	11	12	1
6	12	12	6
6	12	13	1
6	12	14	2
6	12	15	3
6	12	16	2
6	12	17	1
6	12	18	6
6	12	19	1
6	12	20	2
6	12	21	3
6	12	22	2
6	12	23	1
6	12	24	6
6	12	25	1
6	12	26	2
6	12	27	3
6	12	28	2
6	12	29	1
6	12	30	6
6	12	31	1
6	12	32	2

1st	2nd	3rd	GCF
3	6	12	3
4	6	12	2
5	6	12	1
6	6	12	6
6	7	12	1
6	8	12	2
6	9	12	3
6	10	12	2
6	11	12	1
6	12	12	6
6	12	13	1
6	12	14	2
6	12	15	3
6	12	16	2
6	12	17	1
6	12	18	6
6	12	19	1
6	12	20	2
6	12	21	3
6	12	22	2
6	12	23	1
6	12	24	6
6	12	25	1
6	12	26	2
6	12	27	3
6	12	28	2
6	12	29	1
6	12	30	6
6	12	31	1
6	12	32	2