What is the Least Common Multiple of 61986 and 61990?

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 61986 and 61990 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 61986 and 61990, than apply into the LCM equation.

GCF(61986,61990) = 2
LCM(61986,61990) = ( 61986 × 61990) / 2
LCM(61986,61990) = 3842512140 / 2
LCM(61986,61990) = 1921256070

Least Common Multiple (LCM) of 61986 and 61990 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 61986 and 61990. First we will calculate the prime factors of 61986 and 61990.

Prime Factorization of 61986

Prime Factorization of 61990

Now multiplying the highest exponent prime factors to calculate the LCM of 61986 and 61990.

LCM(61986,61990) = 2¹ × 3¹ × 10331¹ × 5¹ × 6199¹
LCM(61986,61990) = 1921256070