What is the Least Common Multiple of 31215 and 31220?

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 31215 and 31220 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 31215 and 31220, than apply into the LCM equation.

GCF(31215,31220) = 5
LCM(31215,31220) = ( 31215 × 31220) / 5
LCM(31215,31220) = 974532300 / 5
LCM(31215,31220) = 194906460

Least Common Multiple (LCM) of 31215 and 31220 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 31215 and 31220. First we will calculate the prime factors of 31215 and 31220.

Prime Factorization of 31215

Prime Factorization of 31220

Now multiplying the highest exponent prime factors to calculate the LCM of 31215 and 31220.

LCM(31215,31220) = 3¹ × 5¹ × 2081¹ × 2² × 7¹ × 223¹
LCM(31215,31220) = 194906460