What is the Least Common Multiple of 31400 and 31420?

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 31400 and 31420 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 31400 and 31420, than apply into the LCM equation.

GCF(31400,31420) = 20
LCM(31400,31420) = ( 31400 × 31420) / 20
LCM(31400,31420) = 986588000 / 20
LCM(31400,31420) = 49329400

Least Common Multiple (LCM) of 31400 and 31420 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 31400 and 31420. First we will calculate the prime factors of 31400 and 31420.

Prime Factorization of 31400

Prime Factorization of 31420

Now multiplying the highest exponent prime factors to calculate the LCM of 31400 and 31420.

LCM(31400,31420) = 2³ × 5² × 157¹ × 1571¹
LCM(31400,31420) = 49329400