What is the Least Common Multiple of 78440 and 78445?

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 78440 and 78445 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 78440 and 78445, than apply into the LCM equation.

GCF(78440,78445) = 5
LCM(78440,78445) = ( 78440 × 78445) / 5
LCM(78440,78445) = 6153225800 / 5
LCM(78440,78445) = 1230645160

Least Common Multiple (LCM) of 78440 and 78445 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 78440 and 78445. First we will calculate the prime factors of 78440 and 78445.

Prime Factorization of 78440

Prime Factorization of 78445

Now multiplying the highest exponent prime factors to calculate the LCM of 78440 and 78445.

LCM(78440,78445) = 2³ × 5¹ × 37¹ × 53¹ × 29¹ × 541¹
LCM(78440,78445) = 1230645160