What is the Least Common Multiple of 21439 and 21445?

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 21439 and 21445 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21439 and 21445, than apply into the LCM equation.

GCF(21439,21445) = 1
LCM(21439,21445) = ( 21439 × 21445) / 1
LCM(21439,21445) = 459759355 / 1
LCM(21439,21445) = 459759355

Least Common Multiple (LCM) of 21439 and 21445 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21439 and 21445. First we will calculate the prime factors of 21439 and 21445.

Prime Factorization of 21439

Prime Factorization of 21445

Now multiplying the highest exponent prime factors to calculate the LCM of 21439 and 21445.

LCM(21439,21445) = 11¹ × 1949¹ × 5¹ × 4289¹
LCM(21439,21445) = 459759355