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What is the Least Common Multiple of 27988 and 28005?

Least common multiple or lowest common denominator (lcd) can be calculated in two way; with the LCM formula calculation of greatest common factor (GCF), or multiplying the prime factors with the highest exponent factor.

Least common multiple (LCM) of 27988 and 28005 is 783803940.

LCM(27988,28005) = 783803940

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Least Common Multiple of 27988 and 28005 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 27988 and 28005, than apply into the LCM equation.

GCF(27988,28005) = 1
LCM(27988,28005) = ( 27988 × 28005) / 1
LCM(27988,28005) = 783803940 / 1
LCM(27988,28005) = 783803940

Least Common Multiple (LCM) of 27988 and 28005 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 27988 and 28005. First we will calculate the prime factors of 27988 and 28005.

Prime Factorization of 27988

Prime factors of 27988 are 2, 6997. Prime factorization of 27988 in exponential form is:

27988 = 22 × 69971

Prime Factorization of 28005

Prime factors of 28005 are 3, 5, 1867. Prime factorization of 28005 in exponential form is:

28005 = 31 × 51 × 18671

Now multiplying the highest exponent prime factors to calculate the LCM of 27988 and 28005.

LCM(27988,28005) = 22 × 69971 × 31 × 51 × 18671
LCM(27988,28005) = 783803940