What is the Least Common Multiple of 67421 and 67438?

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 67421 and 67438 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 67421 and 67438, than apply into the LCM equation.

GCF(67421,67438) = 1
LCM(67421,67438) = ( 67421 × 67438) / 1
LCM(67421,67438) = 4546737398 / 1
LCM(67421,67438) = 4546737398

Least Common Multiple (LCM) of 67421 and 67438 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 67421 and 67438. First we will calculate the prime factors of 67421 and 67438.

Prime Factorization of 67421

Prime Factorization of 67438

Now multiplying the highest exponent prime factors to calculate the LCM of 67421 and 67438.

LCM(67421,67438) = 67421¹ × 2¹ × 7¹ × 4817¹
LCM(67421,67438) = 4546737398