What is the Least Common Multiple of 72920 and 72940?

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 72920 and 72940 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 72920 and 72940, than apply into the LCM equation.

GCF(72920,72940) = 20
LCM(72920,72940) = ( 72920 × 72940) / 20
LCM(72920,72940) = 5318784800 / 20
LCM(72920,72940) = 265939240

Least Common Multiple (LCM) of 72920 and 72940 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 72920 and 72940. First we will calculate the prime factors of 72920 and 72940.

Prime Factorization of 72920

Prime Factorization of 72940

Now multiplying the highest exponent prime factors to calculate the LCM of 72920 and 72940.

LCM(72920,72940) = 2³ × 5¹ × 1823¹ × 7¹ × 521¹
LCM(72920,72940) = 265939240