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    GCF for 9, 18 and 27

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

    What's the Greatest Common Factor (GCF) of 9, 18 and 27?

    Answer

    GCF of 9, 18 and 27 is
    9

    Common factors: 1, 3, 9

    9 divides all three: 9 ÷ 9 = 1, 18 ÷ 9 = 2, 27 ÷ 9 = 3 — and 1, 2 and 3 have no factor but 1 common to all of them, so no larger number divides all three.

    9 = 32

    18 = 2 × 32

    27 = 33

    Prime91827Lowest power
    2—2——
    332323332

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

    GCF = 32 = 9

    More with these numbers

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    https://calculat.io/en/number/greatest-common-factor-of-3-numbers/9--18--27Copy
    <a href="https://calculat.io/en/number/greatest-common-factor-of-3-numbers/9--18--27">What is the GCF of 9, 18 and 27? - Calculatio</a>Copy
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    What is the GCF of 9, 18 and 27? The GCF of 9, 18 and 27 is 9 — the largest number that divides all three with no remainder. Step-by-step solution for three numbers.
    https://calculat.io/en/number/greatest-common-factor-of-3-numbers/9--18--27/generated.jpgCopy

    GCF Table

    1st2nd3rdGCF
    912183
    913181
    914181
    915183
    916181
    917181
    918189
    918191
    918201
    918213
    918221
    918231
    918243
    918251
    918261
    918279
    918281
    918291
    918303
    918311
    918321
    918333
    918341
    918351
    918369
    918371
    918381
    918393
    918401
    918411

    FAQ

    What's the Greatest Common Factor (GCF) of 9, 18 and 27?

    GCF of 9, 18 and 27 is 9

    What prime factors do 9, 18 and 27 share?

    All three factorizations contain 3 × 3, and multiplying those shared primes gives 9 — exactly the greatest common factor.

    Can you get the GCF of 9, 18 and 27 two numbers at a time?

    Yes. The GCF of 9 and 18 is 9, and the GCF of 9 and 27 is 9 — 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 9 : 18 : 27?

    Divide every term by the GCF 9: 9 ÷ 9 = 1, 18 ÷ 9 = 2 and 27 ÷ 9 = 3. So 9 : 18 : 27 in lowest terms is 1 : 2 : 3, and no whole number other than 1 divides all three of those.

    See Also