What is the Least Common Multiple of 3978 and 3992?

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 3978 and 3992 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 3978 and 3992, than apply into the LCM equation.

GCF(3978,3992) = 2
LCM(3978,3992) = ( 3978 × 3992) / 2
LCM(3978,3992) = 15880176 / 2
LCM(3978,3992) = 7940088

Least Common Multiple (LCM) of 3978 and 3992 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 3978 and 3992. First we will calculate the prime factors of 3978 and 3992.

Prime Factorization of 3978

Prime Factorization of 3992

Now multiplying the highest exponent prime factors to calculate the LCM of 3978 and 3992.

LCM(3978,3992) = 2³ × 3² × 13¹ × 17¹ × 499¹
LCM(3978,3992) = 7940088