What is the Least Common Multiple of 10115 and 10120?

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 10115 and 10120 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 10115 and 10120, than apply into the LCM equation.

GCF(10115,10120) = 5
LCM(10115,10120) = ( 10115 × 10120) / 5
LCM(10115,10120) = 102363800 / 5
LCM(10115,10120) = 20472760

Least Common Multiple (LCM) of 10115 and 10120 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 10115 and 10120. First we will calculate the prime factors of 10115 and 10120.

Prime Factorization of 10115

Prime Factorization of 10120

Now multiplying the highest exponent prime factors to calculate the LCM of 10115 and 10120.

LCM(10115,10120) = 5¹ × 7¹ × 17² × 2³ × 11¹ × 23¹
LCM(10115,10120) = 20472760