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What is the Least Common Multiple of 27991 and 28008?

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 27991 and 28008 is 783971928.

LCM(27991,28008) = 783971928

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Least Common Multiple of 27991 and 28008 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 27991 and 28008, than apply into the LCM equation.

GCF(27991,28008) = 1
LCM(27991,28008) = ( 27991 × 28008) / 1
LCM(27991,28008) = 783971928 / 1
LCM(27991,28008) = 783971928

Least Common Multiple (LCM) of 27991 and 28008 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 27991 and 28008. First we will calculate the prime factors of 27991 and 28008.

Prime Factorization of 27991

Prime factors of 27991 are 23, 1217. Prime factorization of 27991 in exponential form is:

27991 = 231 × 12171

Prime Factorization of 28008

Prime factors of 28008 are 2, 3, 389. Prime factorization of 28008 in exponential form is:

28008 = 23 × 32 × 3891

Now multiplying the highest exponent prime factors to calculate the LCM of 27991 and 28008.

LCM(27991,28008) = 231 × 12171 × 23 × 32 × 3891
LCM(27991,28008) = 783971928