What is the Least Common Multiple of 39870 and 39890?

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 39870 and 39890 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 39870 and 39890, than apply into the LCM equation.

GCF(39870,39890) = 10
LCM(39870,39890) = ( 39870 × 39890) / 10
LCM(39870,39890) = 1590414300 / 10
LCM(39870,39890) = 159041430

Least Common Multiple (LCM) of 39870 and 39890 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 39870 and 39890. First we will calculate the prime factors of 39870 and 39890.

Prime Factorization of 39870

Prime Factorization of 39890

Now multiplying the highest exponent prime factors to calculate the LCM of 39870 and 39890.

LCM(39870,39890) = 2¹ × 3² × 5¹ × 443¹ × 3989¹
LCM(39870,39890) = 159041430