What is the Least Common Multiple of 42986 and 42990?

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 42986 and 42990 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 42986 and 42990, than apply into the LCM equation.

GCF(42986,42990) = 2
LCM(42986,42990) = ( 42986 × 42990) / 2
LCM(42986,42990) = 1847968140 / 2
LCM(42986,42990) = 923984070

Least Common Multiple (LCM) of 42986 and 42990 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 42986 and 42990. First we will calculate the prime factors of 42986 and 42990.

Prime Factorization of 42986

Prime Factorization of 42990

Now multiplying the highest exponent prime factors to calculate the LCM of 42986 and 42990.

LCM(42986,42990) = 2¹ × 21493¹ × 3¹ × 5¹ × 1433¹
LCM(42986,42990) = 923984070