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What is the Least Common Multiple of 27978 and 27987?

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 27978 and 27987 is 261006762.

LCM(27978,27987) = 261006762

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Least Common Multiple of 27978 and 27987 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 27978 and 27987, than apply into the LCM equation.

GCF(27978,27987) = 3
LCM(27978,27987) = ( 27978 × 27987) / 3
LCM(27978,27987) = 783020286 / 3
LCM(27978,27987) = 261006762

Least Common Multiple (LCM) of 27978 and 27987 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 27978 and 27987. First we will calculate the prime factors of 27978 and 27987.

Prime Factorization of 27978

Prime factors of 27978 are 2, 3, 4663. Prime factorization of 27978 in exponential form is:

27978 = 21 × 31 × 46631

Prime Factorization of 27987

Prime factors of 27987 are 3, 19, 491. Prime factorization of 27987 in exponential form is:

27987 = 31 × 191 × 4911

Now multiplying the highest exponent prime factors to calculate the LCM of 27978 and 27987.

LCM(27978,27987) = 21 × 31 × 46631 × 191 × 4911
LCM(27978,27987) = 261006762