What is the Least Common Multiple of 78428 and 78448?

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 78428 and 78448 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 78428 and 78448, than apply into the LCM equation.

GCF(78428,78448) = 4
LCM(78428,78448) = ( 78428 × 78448) / 4
LCM(78428,78448) = 6152519744 / 4
LCM(78428,78448) = 1538129936

Least Common Multiple (LCM) of 78428 and 78448 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 78428 and 78448. First we will calculate the prime factors of 78428 and 78448.

Prime Factorization of 78428

Prime Factorization of 78448

Now multiplying the highest exponent prime factors to calculate the LCM of 78428 and 78448.

LCM(78428,78448) = 2⁴ × 7¹ × 2801¹ × 4903¹
LCM(78428,78448) = 1538129936