What is the Least Common Multiple of 78438 and 78446?

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 78438 and 78446 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 78438 and 78446, than apply into the LCM equation.

GCF(78438,78446) = 2
LCM(78438,78446) = ( 78438 × 78446) / 2
LCM(78438,78446) = 6153147348 / 2
LCM(78438,78446) = 3076573674

Least Common Multiple (LCM) of 78438 and 78446 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 78438 and 78446. First we will calculate the prime factors of 78438 and 78446.

Prime Factorization of 78438

Prime Factorization of 78446

Now multiplying the highest exponent prime factors to calculate the LCM of 78438 and 78446.

LCM(78438,78446) = 2¹ × 3¹ × 17¹ × 769¹ × 61¹ × 643¹
LCM(78438,78446) = 3076573674