What is the Least Common Multiple of 15905 and 15920?

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 15905 and 15920 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 15905 and 15920, than apply into the LCM equation.

GCF(15905,15920) = 5
LCM(15905,15920) = ( 15905 × 15920) / 5
LCM(15905,15920) = 253207600 / 5
LCM(15905,15920) = 50641520

Least Common Multiple (LCM) of 15905 and 15920 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 15905 and 15920. First we will calculate the prime factors of 15905 and 15920.

Prime Factorization of 15905

Prime Factorization of 15920

Now multiplying the highest exponent prime factors to calculate the LCM of 15905 and 15920.

LCM(15905,15920) = 5¹ × 3181¹ × 2⁴ × 199¹
LCM(15905,15920) = 50641520