What is the Least Common Multiple of 78561 and 78570?

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 78561 and 78570 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 78561 and 78570, than apply into the LCM equation.

GCF(78561,78570) = 9
LCM(78561,78570) = ( 78561 × 78570) / 9
LCM(78561,78570) = 6172537770 / 9
LCM(78561,78570) = 685837530

Least Common Multiple (LCM) of 78561 and 78570 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 78561 and 78570. First we will calculate the prime factors of 78561 and 78570.

Prime Factorization of 78561

Prime Factorization of 78570

Now multiplying the highest exponent prime factors to calculate the LCM of 78561 and 78570.

LCM(78561,78570) = 3⁴ × 7¹ × 29¹ × 43¹ × 2¹ × 5¹ × 97¹
LCM(78561,78570) = 685837530