What is the Least Common Multiple of 18915 and 18920?

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 18915 and 18920 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 18915 and 18920, than apply into the LCM equation.

GCF(18915,18920) = 5
LCM(18915,18920) = ( 18915 × 18920) / 5
LCM(18915,18920) = 357871800 / 5
LCM(18915,18920) = 71574360

Least Common Multiple (LCM) of 18915 and 18920 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 18915 and 18920. First we will calculate the prime factors of 18915 and 18920.

Prime Factorization of 18915

Prime Factorization of 18920

Now multiplying the highest exponent prime factors to calculate the LCM of 18915 and 18920.

LCM(18915,18920) = 3¹ × 5¹ × 13¹ × 97¹ × 2³ × 11¹ × 43¹
LCM(18915,18920) = 71574360