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    GCF (HCF) of 121 and 165

    "Greatest Common Factor" Calculator
    Greatest Common Factor of
    and

    What is the Greatest Common Divisor of 121 and 165?

    Answer

    GCF (HCF) of 121 and 165 is
    11

    Common factors: 1, 11

    11 divides both: 121 ÷ 11 = 11, 165 ÷ 11 = 15 — and 11 and 15 share no factor but 1, so no larger number divides both.

    121 = 112

    165 = 3 × 5 × 11

    Prime121165Lowest power
    3—3—
    5—5—
    111121111

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

    GCF = 11

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    What is the GCF (HCF) of 121 and 165. The GCF of 121 and 165 is 11 — 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
    1211501
    1211511
    1211521
    1211531
    12115411
    1211551
    1211561
    1211571
    1211581
    1211591
    1211601
    1211611
    1211621
    1211631
    1211641
    12116511
    1211661
    1211671
    1211681
    1211691
    1211701
    1211711
    1211721
    1211731
    1211741
    1211751
    12117611
    1211771
    1211781
    1211791

    FAQ

    What is the Greatest Common Divisor of 121 and 165?

    GCF (HCF) of 121 and 165 is 11

    How to find the GCF of 121 and 165?

    You can find the GCF of 121 and 165 by listing all factors of both numbers and picking the greatest common one, or by prime factorization. The GCF of 121 and 165 is 11.

    What prime factors do 121 and 165 share?

    The prime factorizations of 121 and 165 have 11 in common, and multiplying those shared primes gives 11 — exactly the greatest common factor.

    How does the GCF reduce the fraction 121/165?

    Divide the numerator and the denominator by the GCF 11: 121 ÷ 11 = 11 and 165 ÷ 11 = 15. So 121/165 in lowest terms is 11/15.

    See Also