What is the Least Common Multiple of 20161 and 20172?

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 20161 and 20172 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 20161 and 20172, than apply into the LCM equation.

GCF(20161,20172) = 1
LCM(20161,20172) = ( 20161 × 20172) / 1
LCM(20161,20172) = 406687692 / 1
LCM(20161,20172) = 406687692

Least Common Multiple (LCM) of 20161 and 20172 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 20161 and 20172. First we will calculate the prime factors of 20161 and 20172.

Prime Factorization of 20161

Prime Factorization of 20172

Now multiplying the highest exponent prime factors to calculate the LCM of 20161 and 20172.

LCM(20161,20172) = 20161¹ × 2² × 3¹ × 41²
LCM(20161,20172) = 406687692