What is the Least Common Multiple of 78020 and 78028?

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 78020 and 78028 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 78020 and 78028, than apply into the LCM equation.

GCF(78020,78028) = 4
LCM(78020,78028) = ( 78020 × 78028) / 4
LCM(78020,78028) = 6087744560 / 4
LCM(78020,78028) = 1521936140

Least Common Multiple (LCM) of 78020 and 78028 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 78020 and 78028. First we will calculate the prime factors of 78020 and 78028.

Prime Factorization of 78020

Prime Factorization of 78028

Now multiplying the highest exponent prime factors to calculate the LCM of 78020 and 78028.

LCM(78020,78028) = 2² × 5¹ × 47¹ × 83¹ × 19507¹
LCM(78020,78028) = 1521936140