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    GCF (HCF) of 4 and 40

    "Greatest Common Factor" Calculator
    Greatest Common Factor of
    and

    What is the Greatest Common Divisor of 4 and 40?

    Answer

    GCF (HCF) of 4 and 40 is
    4

    Common factors: 1, 2, 4

    4 divides 40 (40 ÷ 4 = 10), so the GCF is the smaller number itself.

    4 = 22

    40 = 23 × 5

    Prime440Lowest power
    2222322
    5—5—

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

    GCF = 22 = 4

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    What is the GCF (HCF) of 4 and 40. The GCF of 4 and 40 is 4 — 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
    4124
    4131
    4142
    4151
    4164
    4182
    4204
    4211
    4231
    4244
    4251
    4262
    4271
    4284
    4324
    4351
    4371
    4404
    4444
    4451
    4484
    4524
    4531
    4571
    4604
    4804
    4811
    41004
    41204
    41,0004

    FAQ

    What is the Greatest Common Divisor of 4 and 40?

    GCF (HCF) of 4 and 40 is 4

    How to find the GCF of 4 and 40?

    You can find the GCF of 4 and 40 by listing all factors of both numbers and picking the greatest common one, or by prime factorization. The GCF of 4 and 40 is 4.

    What prime factors do 4 and 40 share?

    The prime factorizations of 4 and 40 have 2 × 2 in common, and multiplying those shared primes gives 4 — exactly the greatest common factor.

    How does the GCF reduce the fraction 4/40?

    Divide the numerator and the denominator by the GCF 4: 4 ÷ 4 = 1 and 40 ÷ 4 = 10. So 4/40 in lowest terms is 1/10.

    See Also