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    GCF (HCF) of 36 and 90

    "Greatest Common Factor" Calculator
    Greatest Common Factor of
    and

    What is the Greatest Common Divisor of 36 and 90?

    Answer

    GCF (HCF) of 36 and 90 is
    18

    Common factors: 1, 2, 3, 6, 9, 18

    18 divides both: 36 ÷ 18 = 2, 90 ÷ 18 = 5 — and 2 and 5 share no factor but 1, so no larger number divides both.

    36 = 22 × 32

    90 = 2 × 32 × 5

    Prime3690Lowest power
    22222
    3323232
    5—5—

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

    GCF = 2 × 32 = 18

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    What is the GCF (HCF) of 36 and 90. The GCF of 36 and 90 is 18 — the biggest number that can divide both integers. Step-by-step GCF (GCD) calculation by factoring.
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    GCF Table

    Number 1Number 2GCF
    36426
    36431
    36444
    36459
    36462
    36471
    364812
    36491
    36502
    36513
    36531
    365418
    36551
    36564
    36591
    366012
    36639
    36644
    36666
    36804
    36819
    368412
    369018
    361004
    3612012
    361211
    3613212
    3614436
    3616218
    3690036

    FAQ

    What is the Greatest Common Divisor of 36 and 90?

    GCF (HCF) of 36 and 90 is 18

    How to find the GCF of 36 and 90?

    You can find the GCF of 36 and 90 by listing all factors of both numbers and picking the greatest common one, or by prime factorization. The GCF of 36 and 90 is 18.

    What prime factors do 36 and 90 share?

    The prime factorizations of 36 and 90 have 2 × 3 × 3 in common, and multiplying those shared primes gives 18 — exactly the greatest common factor.

    How does the GCF reduce the fraction 36/90?

    Divide the numerator and the denominator by the GCF 18: 36 ÷ 18 = 2 and 90 ÷ 18 = 5. So 36/90 in lowest terms is 2/5.

    See Also