What is the Least Common Multiple of 21158 and 21178?

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 21158 and 21178 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21158 and 21178, than apply into the LCM equation.

GCF(21158,21178) = 2
LCM(21158,21178) = ( 21158 × 21178) / 2
LCM(21158,21178) = 448084124 / 2
LCM(21158,21178) = 224042062

Least Common Multiple (LCM) of 21158 and 21178 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21158 and 21178. First we will calculate the prime factors of 21158 and 21178.

Prime Factorization of 21158

Prime Factorization of 21178

Now multiplying the highest exponent prime factors to calculate the LCM of 21158 and 21178.

LCM(21158,21178) = 2¹ × 71¹ × 149¹ × 10589¹
LCM(21158,21178) = 224042062