What is the Least Common Multiple of 920 and 940?

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 920 and 940 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 920 and 940, than apply into the LCM equation.

GCF(920,940) = 20
LCM(920,940) = ( 920 × 940) / 20
LCM(920,940) = 864800 / 20
LCM(920,940) = 43240

Least Common Multiple (LCM) of 920 and 940 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 920 and 940. First we will calculate the prime factors of 920 and 940.

Prime Factorization of 920

Prime Factorization of 940

Now multiplying the highest exponent prime factors to calculate the LCM of 920 and 940.

LCM(920,940) = 2³ × 5¹ × 23¹ × 47¹
LCM(920,940) = 43240