What is the Least Common Multiple of 28390 and 28408?

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 28390 and 28408 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 28390 and 28408, than apply into the LCM equation.

GCF(28390,28408) = 2
LCM(28390,28408) = ( 28390 × 28408) / 2
LCM(28390,28408) = 806503120 / 2
LCM(28390,28408) = 403251560

Least Common Multiple (LCM) of 28390 and 28408 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 28390 and 28408. First we will calculate the prime factors of 28390 and 28408.

Prime Factorization of 28390

Prime Factorization of 28408

Now multiplying the highest exponent prime factors to calculate the LCM of 28390 and 28408.

LCM(28390,28408) = 2³ × 5¹ × 17¹ × 167¹ × 53¹ × 67¹
LCM(28390,28408) = 403251560