What is the Least Common Multiple of 21001 and 21007?

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 21001 and 21007 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21001 and 21007, than apply into the LCM equation.

GCF(21001,21007) = 1
LCM(21001,21007) = ( 21001 × 21007) / 1
LCM(21001,21007) = 441168007 / 1
LCM(21001,21007) = 441168007

Least Common Multiple (LCM) of 21001 and 21007 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21001 and 21007. First we will calculate the prime factors of 21001 and 21007.

Prime Factorization of 21001

Prime Factorization of 21007

Now multiplying the highest exponent prime factors to calculate the LCM of 21001 and 21007.

LCM(21001,21007) = 21001¹ × 7¹ × 3001¹
LCM(21001,21007) = 441168007