GCF for 4, 18 and 24

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Greatest Common Factor of
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What's the Greatest Common Factor (GCF) of 4, 18 and 24?

Answer

GCF of 4, 18 and 24 is
2

Common factors: 1, 2

2 divides all three: 4 ÷ 2 = 2, 18 ÷ 2 = 9, 24 ÷ 2 = 12 — and 2, 9 and 12 have no factor but 1 common to all of them, so no larger number divides all three.

4 = 22

18 = 2 × 32

24 = 23 × 3

Prime41824Lowest power
2222232
3—323—

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

GCF = 2

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GCF Table

1st2nd3rdGCF
49181
410182
411181
412182
413181
414182
415181
416182
417181
418182
418191
418202
418211
418222
418231
418242
418251
418262
418271
418282
418291
418302
418311
418322
418331
418342
418351
418362
418371
418382

FAQ

What's the Greatest Common Factor (GCF) of 4, 18 and 24?

GCF of 4, 18 and 24 is 2

What prime factors do 4, 18 and 24 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, 18 and 24 two numbers at a time?

Yes. The GCF of 4 and 18 is 2, and the GCF of 2 and 24 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 : 18 : 24?

Divide every term by the GCF 2: 4 ÷ 2 = 2, 18 ÷ 2 = 9 and 24 ÷ 2 = 12. So 4 : 18 : 24 in lowest terms is 2 : 9 : 12, and no whole number other than 1 divides all three of those.

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