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What is the Least Common Multiple of 28158 and 28172?

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 28158 and 28172 is 396633588.

LCM(28158,28172) = 396633588

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Least Common Multiple of 28158 and 28172 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 28158 and 28172, than apply into the LCM equation.

GCF(28158,28172) = 2
LCM(28158,28172) = ( 28158 × 28172) / 2
LCM(28158,28172) = 793267176 / 2
LCM(28158,28172) = 396633588

Least Common Multiple (LCM) of 28158 and 28172 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 28158 and 28172. First we will calculate the prime factors of 28158 and 28172.

Prime Factorization of 28158

Prime factors of 28158 are 2, 3, 13, 19. Prime factorization of 28158 in exponential form is:

28158 = 21 × 31 × 131 × 192

Prime Factorization of 28172

Prime factors of 28172 are 2, 7043. Prime factorization of 28172 in exponential form is:

28172 = 22 × 70431

Now multiplying the highest exponent prime factors to calculate the LCM of 28158 and 28172.

LCM(28158,28172) = 22 × 31 × 131 × 192 × 70431
LCM(28158,28172) = 396633588