What is the Least Common Multiple of 3981 and 3990?

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 3981 and 3990 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 3981 and 3990, than apply into the LCM equation.

GCF(3981,3990) = 3
LCM(3981,3990) = ( 3981 × 3990) / 3
LCM(3981,3990) = 15884190 / 3
LCM(3981,3990) = 5294730

Least Common Multiple (LCM) of 3981 and 3990 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 3981 and 3990. First we will calculate the prime factors of 3981 and 3990.

Prime Factorization of 3981

Prime Factorization of 3990

Now multiplying the highest exponent prime factors to calculate the LCM of 3981 and 3990.

LCM(3981,3990) = 3¹ × 1327¹ × 2¹ × 5¹ × 7¹ × 19¹
LCM(3981,3990) = 5294730