What is the Least Common Multiple of 7980 and 7989?

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 7980 and 7989 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 7980 and 7989, than apply into the LCM equation.

GCF(7980,7989) = 3
LCM(7980,7989) = ( 7980 × 7989) / 3
LCM(7980,7989) = 63752220 / 3
LCM(7980,7989) = 21250740

Least Common Multiple (LCM) of 7980 and 7989 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 7980 and 7989. First we will calculate the prime factors of 7980 and 7989.

Prime Factorization of 7980

Prime Factorization of 7989

Now multiplying the highest exponent prime factors to calculate the LCM of 7980 and 7989.

LCM(7980,7989) = 2² × 3¹ × 5¹ × 7¹ × 19¹ × 2663¹
LCM(7980,7989) = 21250740