What is the Least Common Multiple of 20390 and 20395?

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 20390 and 20395 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 20390 and 20395, than apply into the LCM equation.

GCF(20390,20395) = 5
LCM(20390,20395) = ( 20390 × 20395) / 5
LCM(20390,20395) = 415854050 / 5
LCM(20390,20395) = 83170810

Least Common Multiple (LCM) of 20390 and 20395 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 20390 and 20395. First we will calculate the prime factors of 20390 and 20395.

Prime Factorization of 20390

Prime Factorization of 20395

Now multiplying the highest exponent prime factors to calculate the LCM of 20390 and 20395.

LCM(20390,20395) = 2¹ × 5¹ × 2039¹ × 4079¹
LCM(20390,20395) = 83170810