What is the Least Common Multiple of 6720 and 6740?

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 6720 and 6740 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 6720 and 6740, than apply into the LCM equation.

GCF(6720,6740) = 20
LCM(6720,6740) = ( 6720 × 6740) / 20
LCM(6720,6740) = 45292800 / 20
LCM(6720,6740) = 2264640

Least Common Multiple (LCM) of 6720 and 6740 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 6720 and 6740. First we will calculate the prime factors of 6720 and 6740.

Prime Factorization of 6720

Prime Factorization of 6740

Now multiplying the highest exponent prime factors to calculate the LCM of 6720 and 6740.

LCM(6720,6740) = 2⁶ × 3¹ × 5¹ × 7¹ × 337¹
LCM(6720,6740) = 2264640