What is the Least Common Multiple of 39760 and 39780?

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 39760 and 39780 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 39760 and 39780, than apply into the LCM equation.

GCF(39760,39780) = 20
LCM(39760,39780) = ( 39760 × 39780) / 20
LCM(39760,39780) = 1581652800 / 20
LCM(39760,39780) = 79082640

Least Common Multiple (LCM) of 39760 and 39780 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 39760 and 39780. First we will calculate the prime factors of 39760 and 39780.

Prime Factorization of 39760

Prime Factorization of 39780

Now multiplying the highest exponent prime factors to calculate the LCM of 39760 and 39780.

LCM(39760,39780) = 2⁴ × 5¹ × 7¹ × 71¹ × 3² × 13¹ × 17¹
LCM(39760,39780) = 79082640