What is the Least Common Multiple of 2100 and 2109?

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 2100 and 2109 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 2100 and 2109, than apply into the LCM equation.

GCF(2100,2109) = 3
LCM(2100,2109) = ( 2100 × 2109) / 3
LCM(2100,2109) = 4428900 / 3
LCM(2100,2109) = 1476300

Least Common Multiple (LCM) of 2100 and 2109 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 2100 and 2109. First we will calculate the prime factors of 2100 and 2109.

Prime Factorization of 2100

Prime Factorization of 2109

Now multiplying the highest exponent prime factors to calculate the LCM of 2100 and 2109.

LCM(2100,2109) = 2² × 3¹ × 5² × 7¹ × 19¹ × 37¹
LCM(2100,2109) = 1476300