What is the Least Common Multiple of 21969 and 21979?

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 21969 and 21979 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21969 and 21979, than apply into the LCM equation.

GCF(21969,21979) = 1
LCM(21969,21979) = ( 21969 × 21979) / 1
LCM(21969,21979) = 482856651 / 1
LCM(21969,21979) = 482856651

Least Common Multiple (LCM) of 21969 and 21979 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21969 and 21979. First we will calculate the prime factors of 21969 and 21979.

Prime Factorization of 21969

Prime Factorization of 21979

Now multiplying the highest exponent prime factors to calculate the LCM of 21969 and 21979.

LCM(21969,21979) = 3² × 2441¹ × 31¹ × 709¹
LCM(21969,21979) = 482856651