What is the Least Common Multiple of 16905 and 16915?

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 16905 and 16915 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 16905 and 16915, than apply into the LCM equation.

GCF(16905,16915) = 5
LCM(16905,16915) = ( 16905 × 16915) / 5
LCM(16905,16915) = 285948075 / 5
LCM(16905,16915) = 57189615

Least Common Multiple (LCM) of 16905 and 16915 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 16905 and 16915. First we will calculate the prime factors of 16905 and 16915.

Prime Factorization of 16905

Prime Factorization of 16915

Now multiplying the highest exponent prime factors to calculate the LCM of 16905 and 16915.

LCM(16905,16915) = 3¹ × 5¹ × 7² × 23¹ × 17¹ × 199¹
LCM(16905,16915) = 57189615