What is the Least Common Multiple of 3978 and 3986?

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 3986 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 3986, than apply into the LCM equation.

GCF(3978,3986) = 2
LCM(3978,3986) = ( 3978 × 3986) / 2
LCM(3978,3986) = 15856308 / 2
LCM(3978,3986) = 7928154

Least Common Multiple (LCM) of 3978 and 3986 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 3978 and 3986. First we will calculate the prime factors of 3978 and 3986.

Prime Factorization of 3978

Prime Factorization of 3986

Now multiplying the highest exponent prime factors to calculate the LCM of 3978 and 3986.

LCM(3978,3986) = 2¹ × 3² × 13¹ × 17¹ × 1993¹
LCM(3978,3986) = 7928154