What is the Least Common Multiple of 8390 and 8405?

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 8390 and 8405 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 8390 and 8405, than apply into the LCM equation.

GCF(8390,8405) = 5
LCM(8390,8405) = ( 8390 × 8405) / 5
LCM(8390,8405) = 70517950 / 5
LCM(8390,8405) = 14103590

Least Common Multiple (LCM) of 8390 and 8405 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 8390 and 8405. First we will calculate the prime factors of 8390 and 8405.

Prime Factorization of 8390

Prime Factorization of 8405

Now multiplying the highest exponent prime factors to calculate the LCM of 8390 and 8405.

LCM(8390,8405) = 2¹ × 5¹ × 839¹ × 41²
LCM(8390,8405) = 14103590