What is the Least Common Multiple of 21131 and 21138?

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 21131 and 21138 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21131 and 21138, than apply into the LCM equation.

GCF(21131,21138) = 1
LCM(21131,21138) = ( 21131 × 21138) / 1
LCM(21131,21138) = 446667078 / 1
LCM(21131,21138) = 446667078

Least Common Multiple (LCM) of 21131 and 21138 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21131 and 21138. First we will calculate the prime factors of 21131 and 21138.

Prime Factorization of 21131

Prime Factorization of 21138

Now multiplying the highest exponent prime factors to calculate the LCM of 21131 and 21138.

LCM(21131,21138) = 11¹ × 17¹ × 113¹ × 2¹ × 3¹ × 13¹ × 271¹
LCM(21131,21138) = 446667078