What is the Least Common Multiple of 91980 and 91998?

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 91980 and 91998 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 91980 and 91998, than apply into the LCM equation.

GCF(91980,91998) = 18
LCM(91980,91998) = ( 91980 × 91998) / 18
LCM(91980,91998) = 8461976040 / 18
LCM(91980,91998) = 470109780

Least Common Multiple (LCM) of 91980 and 91998 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 91980 and 91998. First we will calculate the prime factors of 91980 and 91998.

Prime Factorization of 91980

Prime Factorization of 91998

Now multiplying the highest exponent prime factors to calculate the LCM of 91980 and 91998.

LCM(91980,91998) = 2² × 3² × 5¹ × 7¹ × 73¹ × 19¹ × 269¹
LCM(91980,91998) = 470109780