What is the Least Common Multiple of 21185 and 21205?

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 21185 and 21205 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21185 and 21205, than apply into the LCM equation.

GCF(21185,21205) = 5
LCM(21185,21205) = ( 21185 × 21205) / 5
LCM(21185,21205) = 449227925 / 5
LCM(21185,21205) = 89845585

Least Common Multiple (LCM) of 21185 and 21205 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21185 and 21205. First we will calculate the prime factors of 21185 and 21205.

Prime Factorization of 21185

Prime Factorization of 21205

Now multiplying the highest exponent prime factors to calculate the LCM of 21185 and 21205.

LCM(21185,21205) = 5¹ × 19¹ × 223¹ × 4241¹
LCM(21185,21205) = 89845585