What is the Least Common Multiple of 2140 and 2156?

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 2140 and 2156 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 2140 and 2156, than apply into the LCM equation.

GCF(2140,2156) = 4
LCM(2140,2156) = ( 2140 × 2156) / 4
LCM(2140,2156) = 4613840 / 4
LCM(2140,2156) = 1153460

Least Common Multiple (LCM) of 2140 and 2156 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 2140 and 2156. First we will calculate the prime factors of 2140 and 2156.

Prime Factorization of 2140

Prime Factorization of 2156

Now multiplying the highest exponent prime factors to calculate the LCM of 2140 and 2156.

LCM(2140,2156) = 2² × 5¹ × 107¹ × 7² × 11¹
LCM(2140,2156) = 1153460