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What is the Least Common Multiple of 2120 and 2140?

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 2120 and 2140 is 226840.

LCM(2120,2140) = 226840

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Least Common Multiple of 2120 and 2140 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 2120 and 2140, than apply into the LCM equation.

GCF(2120,2140) = 20
LCM(2120,2140) = ( 2120 × 2140) / 20
LCM(2120,2140) = 4536800 / 20
LCM(2120,2140) = 226840

Least Common Multiple (LCM) of 2120 and 2140 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 2120 and 2140. First we will calculate the prime factors of 2120 and 2140.

Prime Factorization of 2120

Prime factors of 2120 are 2, 5, 53. Prime factorization of 2120 in exponential form is:

2120 = 23 × 51 × 531

Prime Factorization of 2140

Prime factors of 2140 are 2, 5, 107. Prime factorization of 2140 in exponential form is:

2140 = 22 × 51 × 1071

Now multiplying the highest exponent prime factors to calculate the LCM of 2120 and 2140.

LCM(2120,2140) = 23 × 51 × 531 × 1071
LCM(2120,2140) = 226840