What is the Least Common Multiple of 2142 and 2160?

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 of 2142 and 2160 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 2142 and 2160, than apply into the LCM equation.

GCF(2142,2160) = 18
LCM(2142,2160) = ( 2142 × 2160) / 18
LCM(2142,2160) = 4626720 / 18
LCM(2142,2160) = 257040

Least Common Multiple (LCM) of 2142 and 2160 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 2142 and 2160. First we will calculate the prime factors of 2142 and 2160.

Prime Factorization of 2142

Prime Factorization of 2160

Now multiplying the highest exponent prime factors to calculate the LCM of 2142 and 2160.

LCM(2142,2160) = 2⁴ × 3³ × 7¹ × 17¹ × 5¹
LCM(2142,2160) = 257040