What is the Least Common Multiple of 13991 and 13999?

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 13991 and 13999 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 13991 and 13999, than apply into the LCM equation.

GCF(13991,13999) = 1
LCM(13991,13999) = ( 13991 × 13999) / 1
LCM(13991,13999) = 195860009 / 1
LCM(13991,13999) = 195860009

Least Common Multiple (LCM) of 13991 and 13999 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 13991 and 13999. First we will calculate the prime factors of 13991 and 13999.

Prime Factorization of 13991

Prime Factorization of 13999

Now multiplying the highest exponent prime factors to calculate the LCM of 13991 and 13999.

LCM(13991,13999) = 17¹ × 823¹ × 13999¹
LCM(13991,13999) = 195860009