What is the Least Common Multiple of 2128 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 of 2128 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 2128 and 2140, than apply into the LCM equation.

GCF(2128,2140) = 4
LCM(2128,2140) = ( 2128 × 2140) / 4
LCM(2128,2140) = 4553920 / 4
LCM(2128,2140) = 1138480

Least Common Multiple (LCM) of 2128 and 2140 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 2128 and 2140. First we will calculate the prime factors of 2128 and 2140.

Prime Factorization of 2128

Prime Factorization of 2140

Now multiplying the highest exponent prime factors to calculate the LCM of 2128 and 2140.

LCM(2128,2140) = 2⁴ × 7¹ × 19¹ × 5¹ × 107¹
LCM(2128,2140) = 1138480