What is the Least Common Multiple of 19999 and 20015?

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 19999 and 20015 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 19999 and 20015, than apply into the LCM equation.

GCF(19999,20015) = 1
LCM(19999,20015) = ( 19999 × 20015) / 1
LCM(19999,20015) = 400279985 / 1
LCM(19999,20015) = 400279985

Least Common Multiple (LCM) of 19999 and 20015 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 19999 and 20015. First we will calculate the prime factors of 19999 and 20015.

Prime Factorization of 19999

Prime Factorization of 20015

Now multiplying the highest exponent prime factors to calculate the LCM of 19999 and 20015.

LCM(19999,20015) = 7¹ × 2857¹ × 5¹ × 4003¹
LCM(19999,20015) = 400279985