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What is the Least Common Multiple of 2158 and 2172?

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 2158 and 2172 is 2343588.

LCM(2158,2172) = 2343588

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Least Common Multiple of 2158 and 2172 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 2158 and 2172, than apply into the LCM equation.

GCF(2158,2172) = 2
LCM(2158,2172) = ( 2158 × 2172) / 2
LCM(2158,2172) = 4687176 / 2
LCM(2158,2172) = 2343588

Least Common Multiple (LCM) of 2158 and 2172 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 2158 and 2172. First we will calculate the prime factors of 2158 and 2172.

Prime Factorization of 2158

Prime factors of 2158 are 2, 13, 83. Prime factorization of 2158 in exponential form is:

2158 = 21 × 131 × 831

Prime Factorization of 2172

Prime factors of 2172 are 2, 3, 181. Prime factorization of 2172 in exponential form is:

2172 = 22 × 31 × 1811

Now multiplying the highest exponent prime factors to calculate the LCM of 2158 and 2172.

LCM(2158,2172) = 22 × 131 × 831 × 31 × 1811
LCM(2158,2172) = 2343588