What is the Least Common Multiple of 28981 and 28991?

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 28981 and 28991 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 28981 and 28991, than apply into the LCM equation.

GCF(28981,28991) = 1
LCM(28981,28991) = ( 28981 × 28991) / 1
LCM(28981,28991) = 840188171 / 1
LCM(28981,28991) = 840188171

Least Common Multiple (LCM) of 28981 and 28991 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 28981 and 28991. First we will calculate the prime factors of 28981 and 28991.

Prime Factorization of 28981

Prime Factorization of 28991

Now multiplying the highest exponent prime factors to calculate the LCM of 28981 and 28991.

LCM(28981,28991) = 73¹ × 397¹ × 53¹ × 547¹
LCM(28981,28991) = 840188171