What is the Least Common Multiple of 70405 and 70421?

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 70405 and 70421 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 70405 and 70421, than apply into the LCM equation.

GCF(70405,70421) = 1
LCM(70405,70421) = ( 70405 × 70421) / 1
LCM(70405,70421) = 4957990505 / 1
LCM(70405,70421) = 4957990505

Least Common Multiple (LCM) of 70405 and 70421 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 70405 and 70421. First we will calculate the prime factors of 70405 and 70421.

Prime Factorization of 70405

Prime Factorization of 70421

Now multiplying the highest exponent prime factors to calculate the LCM of 70405 and 70421.

LCM(70405,70421) = 5¹ × 14081¹ × 13¹ × 5417¹
LCM(70405,70421) = 4957990505