What is the Least Common Multiple of 25405 and 25421?

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 25405 and 25421 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 25405 and 25421, than apply into the LCM equation.

GCF(25405,25421) = 1
LCM(25405,25421) = ( 25405 × 25421) / 1
LCM(25405,25421) = 645820505 / 1
LCM(25405,25421) = 645820505

Least Common Multiple (LCM) of 25405 and 25421 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 25405 and 25421. First we will calculate the prime factors of 25405 and 25421.

Prime Factorization of 25405

Prime Factorization of 25421

Now multiplying the highest exponent prime factors to calculate the LCM of 25405 and 25421.

LCM(25405,25421) = 5¹ × 5081¹ × 11¹ × 2311¹
LCM(25405,25421) = 645820505