What is the Least Common Multiple of 73980 and 73990?

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 73980 and 73990 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 73980 and 73990, than apply into the LCM equation.

GCF(73980,73990) = 10
LCM(73980,73990) = ( 73980 × 73990) / 10
LCM(73980,73990) = 5473780200 / 10
LCM(73980,73990) = 547378020

Least Common Multiple (LCM) of 73980 and 73990 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 73980 and 73990. First we will calculate the prime factors of 73980 and 73990.

Prime Factorization of 73980

Prime Factorization of 73990

Now multiplying the highest exponent prime factors to calculate the LCM of 73980 and 73990.

LCM(73980,73990) = 2² × 3³ × 5¹ × 137¹ × 7² × 151¹
LCM(73980,73990) = 547378020