What is the Least Common Multiple of 40390 and 40405?

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 40390 and 40405 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 40390 and 40405, than apply into the LCM equation.

GCF(40390,40405) = 5
LCM(40390,40405) = ( 40390 × 40405) / 5
LCM(40390,40405) = 1631957950 / 5
LCM(40390,40405) = 326391590

Least Common Multiple (LCM) of 40390 and 40405 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 40390 and 40405. First we will calculate the prime factors of 40390 and 40405.

Prime Factorization of 40390

Prime Factorization of 40405

Now multiplying the highest exponent prime factors to calculate the LCM of 40390 and 40405.

LCM(40390,40405) = 2¹ × 5¹ × 7¹ × 577¹ × 8081¹
LCM(40390,40405) = 326391590