What is the Least Common Multiple of 17420 and 17440?

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 17420 and 17440 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 17420 and 17440, than apply into the LCM equation.

GCF(17420,17440) = 20
LCM(17420,17440) = ( 17420 × 17440) / 20
LCM(17420,17440) = 303804800 / 20
LCM(17420,17440) = 15190240

Least Common Multiple (LCM) of 17420 and 17440 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 17420 and 17440. First we will calculate the prime factors of 17420 and 17440.

Prime Factorization of 17420

Prime Factorization of 17440

Now multiplying the highest exponent prime factors to calculate the LCM of 17420 and 17440.

LCM(17420,17440) = 2⁵ × 5¹ × 13¹ × 67¹ × 109¹
LCM(17420,17440) = 15190240