What is the Least Common Multiple of 21415 and 21429?

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 21415 and 21429 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21415 and 21429, than apply into the LCM equation.

GCF(21415,21429) = 1
LCM(21415,21429) = ( 21415 × 21429) / 1
LCM(21415,21429) = 458902035 / 1
LCM(21415,21429) = 458902035

Least Common Multiple (LCM) of 21415 and 21429 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21415 and 21429. First we will calculate the prime factors of 21415 and 21429.

Prime Factorization of 21415

Prime Factorization of 21429

Now multiplying the highest exponent prime factors to calculate the LCM of 21415 and 21429.

LCM(21415,21429) = 5¹ × 4283¹ × 3² × 2381¹
LCM(21415,21429) = 458902035