What is the Least Common Multiple of 7989 and 7998?

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 7989 and 7998 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 7989 and 7998, than apply into the LCM equation.

GCF(7989,7998) = 3
LCM(7989,7998) = ( 7989 × 7998) / 3
LCM(7989,7998) = 63896022 / 3
LCM(7989,7998) = 21298674

Least Common Multiple (LCM) of 7989 and 7998 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 7989 and 7998. First we will calculate the prime factors of 7989 and 7998.

Prime Factorization of 7989

Prime Factorization of 7998

Now multiplying the highest exponent prime factors to calculate the LCM of 7989 and 7998.

LCM(7989,7998) = 3¹ × 2663¹ × 2¹ × 31¹ × 43¹
LCM(7989,7998) = 21298674