What is the Least Common Multiple of 20151 and 20155?

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 20151 and 20155 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 20151 and 20155, than apply into the LCM equation.

GCF(20151,20155) = 1
LCM(20151,20155) = ( 20151 × 20155) / 1
LCM(20151,20155) = 406143405 / 1
LCM(20151,20155) = 406143405

Least Common Multiple (LCM) of 20151 and 20155 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 20151 and 20155. First we will calculate the prime factors of 20151 and 20155.

Prime Factorization of 20151

Prime Factorization of 20155

Now multiplying the highest exponent prime factors to calculate the LCM of 20151 and 20155.

LCM(20151,20155) = 3² × 2239¹ × 5¹ × 29¹ × 139¹
LCM(20151,20155) = 406143405