What is the Least Common Multiple of 3920 and 3924?

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 3920 and 3924 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 3920 and 3924, than apply into the LCM equation.

GCF(3920,3924) = 4
LCM(3920,3924) = ( 3920 × 3924) / 4
LCM(3920,3924) = 15382080 / 4
LCM(3920,3924) = 3845520

Least Common Multiple (LCM) of 3920 and 3924 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 3920 and 3924. First we will calculate the prime factors of 3920 and 3924.

Prime Factorization of 3920

Prime Factorization of 3924

Now multiplying the highest exponent prime factors to calculate the LCM of 3920 and 3924.

LCM(3920,3924) = 2⁴ × 5¹ × 7² × 3² × 109¹
LCM(3920,3924) = 3845520