What is the Least Common Multiple of 31990 and 32008?

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 31990 and 32008 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 31990 and 32008, than apply into the LCM equation.

GCF(31990,32008) = 2
LCM(31990,32008) = ( 31990 × 32008) / 2
LCM(31990,32008) = 1023935920 / 2
LCM(31990,32008) = 511967960

Least Common Multiple (LCM) of 31990 and 32008 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 31990 and 32008. First we will calculate the prime factors of 31990 and 32008.

Prime Factorization of 31990

Prime Factorization of 32008

Now multiplying the highest exponent prime factors to calculate the LCM of 31990 and 32008.

LCM(31990,32008) = 2³ × 5¹ × 7¹ × 457¹ × 4001¹
LCM(31990,32008) = 511967960