What is the Least Common Multiple of 28070 and 28090?

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 28070 and 28090 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 28070 and 28090, than apply into the LCM equation.

GCF(28070,28090) = 10
LCM(28070,28090) = ( 28070 × 28090) / 10
LCM(28070,28090) = 788486300 / 10
LCM(28070,28090) = 78848630

Least Common Multiple (LCM) of 28070 and 28090 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 28070 and 28090. First we will calculate the prime factors of 28070 and 28090.

Prime Factorization of 28070

Prime Factorization of 28090

Now multiplying the highest exponent prime factors to calculate the LCM of 28070 and 28090.

LCM(28070,28090) = 2¹ × 5¹ × 7¹ × 401¹ × 53²
LCM(28070,28090) = 78848630