What is the Least Common Multiple of 71981 and 71985?

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 71981 and 71985 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 71981 and 71985, than apply into the LCM equation.

GCF(71981,71985) = 1
LCM(71981,71985) = ( 71981 × 71985) / 1
LCM(71981,71985) = 5181552285 / 1
LCM(71981,71985) = 5181552285

Least Common Multiple (LCM) of 71981 and 71985 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 71981 and 71985. First we will calculate the prime factors of 71981 and 71985.

Prime Factorization of 71981

Prime Factorization of 71985

Now multiplying the highest exponent prime factors to calculate the LCM of 71981 and 71985.

LCM(71981,71985) = 7² × 13¹ × 113¹ × 3¹ × 5¹ × 4799¹
LCM(71981,71985) = 5181552285