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    GCF (HCF) of 8 and 45

    "Greatest Common Factor" Calculator
    Greatest Common Factor of
    and

    What is the Greatest Common Divisor of 8 and 45?

    Answer

    GCF (HCF) of 8 and 45 is
    1

    Common factors: 1

    Only 1 divides both: 8 and 45 share no prime factor.

    Such numbers are called coprime (relatively prime); their LCM is just the product: 8 × 45 = 360.

    8 = 23

    45 = 32 × 5

    Prime845Lowest power
    223——
    3—32—
    5—5—

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

    GCF = 1

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    What is the GCF (HCF) of 8 and 45. The GCF of 8 and 45 is 1 — 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
    8248
    8251
    8262
    8271
    8284
    8291
    8302
    8328
    8331
    8351
    8364
    8408
    8422
    8431
    8444
    8451
    8488
    8491
    8502
    8524
    8531
    8568
    8591
    8604
    8631
    8648
    8728
    8808
    8902
    8968

    FAQ

    What is the Greatest Common Divisor of 8 and 45?

    GCF (HCF) of 8 and 45 is 1

    How to find the GCF of 8 and 45?

    You can find the GCF of 8 and 45 by listing all factors of both numbers and picking the greatest common one, or by prime factorization. The GCF of 8 and 45 is 1.

    What prime factors do 8 and 45 share?

    8 and 45 have no prime factor in common, so the only integer that divides both of them is 1 and their GCF is 1.

    How does the GCF reduce the fraction 8/45?

    Divide the numerator and the denominator by the GCF 1: 8 ÷ 1 = 8 and 45 ÷ 1 = 45. So 8/45 in lowest terms is 8/45.

    Are 8 and 45 coprime?

    Yes, 8 and 45 are coprime (relatively prime) because their Greatest Common Factor is 1.

    See Also