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    GCF for 5, 12 and 20

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

    What's the Greatest Common Factor (GCF) of 5, 12 and 20?

    Answer

    GCF of 5, 12 and 20 is
    1

    Common factors: 1

    Only 1 divides all three: no prime is a factor of each of 5, 12 and 20.

    Pairs do share factors — GCF(5, 20) = 5, GCF(12, 20) = 4 — just none greater than 1 common to all three.

    5 — prime

    12 = 22 × 3

    20 = 22 × 5

    Prime51220Lowest power
    2—2222—
    3—3——
    55—5—

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

    GCF = 1

    More with these numbers

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    https://calculat.io/en/number/greatest-common-factor-of-3-numbers/5--12--20Copy
    <a href="https://calculat.io/en/number/greatest-common-factor-of-3-numbers/5--12--20">What is the GCF of 5, 12 and 20? - Calculatio</a>Copy
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    What is the GCF of 5, 12 and 20? The GCF of 5, 12 and 20 is 1 — 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/5--12--20/generated.jpgCopy

    GCF Table

    1st2nd3rdGCF
    55121
    56121
    57121
    58121
    59121
    510121
    511121
    512121
    512131
    512141
    512151
    512161
    512171
    512181
    512191
    512201
    512211
    512221
    512231
    512241
    512251
    512261
    512271
    512281
    512291
    512301
    512311
    512321
    512331
    512341

    FAQ

    What's the Greatest Common Factor (GCF) of 5, 12 and 20?

    GCF of 5, 12 and 20 is 1

    What prime factors do 5, 12 and 20 share?

    None at all: 5, 12 and 20 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 5, 12 and 20 two numbers at a time?

    Yes. The GCF of 5 and 12 is 1, and the GCF of 1 and 20 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 5 : 12 : 20?

    Divide every term by the GCF 1: 5 ÷ 1 = 5, 12 ÷ 1 = 12 and 20 ÷ 1 = 20. So 5 : 12 : 20 in lowest terms is 5 : 12 : 20, and no whole number other than 1 divides all three of those.

    See Also