What is the Least Common Multiple of 42740 and 42756?

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 42740 and 42756 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 42740 and 42756, than apply into the LCM equation.

GCF(42740,42756) = 4
LCM(42740,42756) = ( 42740 × 42756) / 4
LCM(42740,42756) = 1827391440 / 4
LCM(42740,42756) = 456847860

Least Common Multiple (LCM) of 42740 and 42756 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 42740 and 42756. First we will calculate the prime factors of 42740 and 42756.

Prime Factorization of 42740

Prime Factorization of 42756

Now multiplying the highest exponent prime factors to calculate the LCM of 42740 and 42756.

LCM(42740,42756) = 2² × 5¹ × 2137¹ × 3¹ × 7¹ × 509¹
LCM(42740,42756) = 456847860