What is the Least Common Multiple of 1558 and 1568?

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 1558 and 1568 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 1558 and 1568, than apply into the LCM equation.

GCF(1558,1568) = 2
LCM(1558,1568) = ( 1558 × 1568) / 2
LCM(1558,1568) = 2442944 / 2
LCM(1558,1568) = 1221472

Least Common Multiple (LCM) of 1558 and 1568 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 1558 and 1568. First we will calculate the prime factors of 1558 and 1568.

Prime Factorization of 1558

Prime Factorization of 1568

Now multiplying the highest exponent prime factors to calculate the LCM of 1558 and 1568.

LCM(1558,1568) = 2⁵ × 19¹ × 41¹ × 7²
LCM(1558,1568) = 1221472