What is the Least Common Multiple of 28015 and 28028?

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 28015 and 28028 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 28015 and 28028, than apply into the LCM equation.

GCF(28015,28028) = 13
LCM(28015,28028) = ( 28015 × 28028) / 13
LCM(28015,28028) = 785204420 / 13
LCM(28015,28028) = 60400340

Least Common Multiple (LCM) of 28015 and 28028 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 28015 and 28028. First we will calculate the prime factors of 28015 and 28028.

Prime Factorization of 28015

Prime Factorization of 28028

Now multiplying the highest exponent prime factors to calculate the LCM of 28015 and 28028.

LCM(28015,28028) = 5¹ × 13¹ × 431¹ × 2² × 7² × 11¹
LCM(28015,28028) = 60400340