What is the Least Common Multiple of 20987 and 21006?

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 20987 and 21006 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 20987 and 21006, than apply into the LCM equation.

GCF(20987,21006) = 1
LCM(20987,21006) = ( 20987 × 21006) / 1
LCM(20987,21006) = 440852922 / 1
LCM(20987,21006) = 440852922

Least Common Multiple (LCM) of 20987 and 21006 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 20987 and 21006. First we will calculate the prime factors of 20987 and 21006.

Prime Factorization of 20987

Prime Factorization of 21006

Now multiplying the highest exponent prime factors to calculate the LCM of 20987 and 21006.

LCM(20987,21006) = 31¹ × 677¹ × 2¹ × 3³ × 389¹
LCM(20987,21006) = 440852922