GCF for 4, 6 and 20

"Greatest Common Factor of 3 Numbers" Calculator
Greatest Common Factor of
,
and

What's the Greatest Common Factor (GCF) of 4, 6 and 20?

Answer

GCF of 4, 6 and 20 is
2

Common factors: 1, 2

2 divides all three: 4 ÷ 2 = 2, 6 ÷ 2 = 3, 20 ÷ 2 = 10 — and 2, 3 and 10 have no factor but 1 common to all of them, so no larger number divides all three.

4 = 22

6 = 2 × 3

20 = 22 × 5

Prime4620Lowest power
2222222
3—3——
5——5—

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

GCF = 2

More with these numbers

Related Calculations

See Also

GCF Table

1st2nd3rdGCF
4561
4662
4671
4682
4691
46102
46111
46122
46131
46142
46151
46162
46171
46182
46191
46202
46211
46222
46231
46242
46251
46262
46271
46282
46291
46302
46311
46322
46331
46342

FAQ

What's the Greatest Common Factor (GCF) of 4, 6 and 20?

GCF of 4, 6 and 20 is 2

What prime factors do 4, 6 and 20 share?

All three factorizations contain 2, and multiplying those shared primes gives 2 — exactly the greatest common factor.

Can you get the GCF of 4, 6 and 20 two numbers at a time?

Yes. The GCF of 4 and 6 is 2, and the GCF of 2 and 20 is 2 — 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 4 : 6 : 20?

Divide every term by the GCF 2: 4 ÷ 2 = 2, 6 ÷ 2 = 3 and 20 ÷ 2 = 10. So 4 : 6 : 20 in lowest terms is 2 : 3 : 10, and no whole number other than 1 divides all three of those.

See Also