What is the Least Common Multiple of 39940 and 39958?

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 39940 and 39958 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 39940 and 39958, than apply into the LCM equation.

GCF(39940,39958) = 2
LCM(39940,39958) = ( 39940 × 39958) / 2
LCM(39940,39958) = 1595922520 / 2
LCM(39940,39958) = 797961260

Least Common Multiple (LCM) of 39940 and 39958 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 39940 and 39958. First we will calculate the prime factors of 39940 and 39958.

Prime Factorization of 39940

Prime Factorization of 39958

Now multiplying the highest exponent prime factors to calculate the LCM of 39940 and 39958.

LCM(39940,39958) = 2² × 5¹ × 1997¹ × 19979¹
LCM(39940,39958) = 797961260