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    LCM for 4, 5 and 20

    "Least Common Multiple of 3 Numbers" Calculator
    Least Common Multiple of
    ,
    and

    What's the Least Common Multiple (LCM) of 4, 5 and 20?

    Answer

    LCM of 4, 5 and 20 is
    20

    First common multiples: 20, 40, 60, …

    20 is divisible by all three: 20 ÷ 4 = 5, 20 ÷ 5 = 4, 20 ÷ 20 = 1 — and 5, 4 and 1 have no factor but 1 common to all of them, so no smaller number is. As a common denominator: multiply the top and bottom of x/4 by 5 and of y/5 by 4.

    4 = 22

    5 — prime

    20 = 22 × 5

    Prime4520Highest power
    222—2222
    5—555

    — = power 0: the prime is not a factor of this number; the LCM takes it from the number that has it.

    LCM = 22 × 5 = 20

    More with these numbers

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    https://calculat.io/en/number/least-common-multiple-lcm-of-3-numbers/4--5--20Copy
    <a href="https://calculat.io/en/number/least-common-multiple-lcm-of-3-numbers/4--5--20">What is the LCM of 4, 5 and 20? - Calculatio</a>Copy
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    What is the LCM of 4, 5 and 20? The LCM of 4, 5 and 20 is 20 — the smallest number all three divide with no remainder. Step-by-step solution for three numbers.
    https://calculat.io/en/number/least-common-multiple-lcm-of-3-numbers/4--5--20/generated.jpgCopy

    LCM Table

    1st2nd3rdLCM
    45520
    45660
    457140
    45840
    459180
    451020
    4511220
    451260
    4513260
    4514140
    451560
    451680
    4517340
    4518180
    4519380
    452020
    4521420
    4522220
    4523460
    4524120
    4525100
    4526260
    4527540
    4528140
    4529580
    453060
    4531620
    4532160
    4533660
    4534340

    FAQ

    What's the Least Common Multiple (LCM) of 4, 5 and 20?

    LCM of 4, 5 and 20 is 20

    How to find the LCM of 4, 5 and 20 by prime factorization?

    Take every prime that appears in 4, 5 and 20 to the highest power it reaches in any one of them and multiply: 2² × 5 = 20.

    Can you get the LCM of 4, 5 and 20 two numbers at a time?

    Yes. The LCM of 4 and 5 is 20, and the LCM of 20 and 20 is 20 — the same answer, because the least common multiple is associative and does not depend on the order of the three numbers.

    Is 20 divisible by 4, 5 and 20?

    Yes, and by definition it is the smallest positive integer that is: 20 ÷ 4, 20 ÷ 5 and 20 ÷ 20 all come out whole. Any other common multiple of 4, 5 and 20 is a multiple of 20.

    See Also