What is the Least Common Multiple of 2980 and 2990?

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 2980 and 2990 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 2980 and 2990, than apply into the LCM equation.

GCF(2980,2990) = 10
LCM(2980,2990) = ( 2980 × 2990) / 10
LCM(2980,2990) = 8910200 / 10
LCM(2980,2990) = 891020

Least Common Multiple (LCM) of 2980 and 2990 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 2980 and 2990. First we will calculate the prime factors of 2980 and 2990.

Prime Factorization of 2980

Prime Factorization of 2990

Now multiplying the highest exponent prime factors to calculate the LCM of 2980 and 2990.

LCM(2980,2990) = 2² × 5¹ × 149¹ × 13¹ × 23¹
LCM(2980,2990) = 891020