Feedback form
Hi! What do you think?

Drag it here or paste with Ctrl+V

    You can also email us on infocalculat.io

    GCF (HCF) of 20 and 28

    "Greatest Common Factor" Calculator
    Greatest Common Factor of
    and

    What is the Greatest Common Divisor of 20 and 28?

    Answer

    GCF (HCF) of 20 and 28 is
    4

    Common factors: 1, 2, 4

    4 divides both: 20 ÷ 4 = 5, 28 ÷ 4 = 7 — and 5 and 7 share no factor but 1, so no larger number divides both.

    20 = 22 × 5

    28 = 22 × 7

    Prime2028Lowest power
    2222222
    55——
    7—7—

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

    GCF = 22 = 4

    More with these numbers

    Related Calculations

    See Also

    Share This Calculation
    Print
    https://calculat.io/en/number/greatest-common-factor-of/20--28Copy
    <a href="https://calculat.io/en/number/greatest-common-factor-of/20--28">What is the GCF (HCF) of 20 and 28 - Calculatio</a>Copy
    Facebook
    Twitter
    Telegram
    WhatsApp
    Viber
    Email
    What is the GCF (HCF) of 20 and 28. The GCF of 20 and 28 is 4 — the biggest number that can divide both integers. Step-by-step GCF (GCD) calculation by factoring.
    https://calculat.io/en/number/greatest-common-factor-of/20--28/generated.jpgCopy

    GCF Table

    Number 1Number 2GCF
    20124
    20155
    20211
    20222
    20231
    20244
    20255
    20262
    20271
    20284
    203010
    20324
    20355
    20364
    20382
    20391
    204020
    20422
    20444
    20455
    20471
    20484
    205010
    20555
    20564
    20582
    20591
    206020
    207010
    20755

    FAQ

    What is the Greatest Common Divisor of 20 and 28?

    GCF (HCF) of 20 and 28 is 4

    How to find the GCF of 20 and 28?

    You can find the GCF of 20 and 28 by listing all factors of both numbers and picking the greatest common one, or by prime factorization. The GCF of 20 and 28 is 4.

    What prime factors do 20 and 28 share?

    The prime factorizations of 20 and 28 have 2 × 2 in common, and multiplying those shared primes gives 4 — exactly the greatest common factor.

    How does the GCF reduce the fraction 20/28?

    Divide the numerator and the denominator by the GCF 4: 20 ÷ 4 = 5 and 28 ÷ 4 = 7. So 20/28 in lowest terms is 5/7.

    See Also