What is the Least Common Multiple of 172 and 181?

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 172 and 181 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 172 and 181, than apply into the LCM equation.

GCF(172,181) = 1
LCM(172,181) = ( 172 × 181) / 1
LCM(172,181) = 31132 / 1
LCM(172,181) = 31132

Least Common Multiple (LCM) of 172 and 181 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 172 and 181. First we will calculate the prime factors of 172 and 181.

Prime Factorization of 172

Prime Factorization of 181

Now multiplying the highest exponent prime factors to calculate the LCM of 172 and 181.

LCM(172,181) = 2² × 43¹ × 181¹
LCM(172,181) = 31132