What is the Least Common Multiple of 17870 and 17890?

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 17870 and 17890 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 17870 and 17890, than apply into the LCM equation.

GCF(17870,17890) = 10
LCM(17870,17890) = ( 17870 × 17890) / 10
LCM(17870,17890) = 319694300 / 10
LCM(17870,17890) = 31969430

Least Common Multiple (LCM) of 17870 and 17890 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 17870 and 17890. First we will calculate the prime factors of 17870 and 17890.

Prime Factorization of 17870

Prime Factorization of 17890

Now multiplying the highest exponent prime factors to calculate the LCM of 17870 and 17890.

LCM(17870,17890) = 2¹ × 5¹ × 1787¹ × 1789¹
LCM(17870,17890) = 31969430