What is the Least Common Multiple of 15638 and 15642?

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 15638 and 15642 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 15638 and 15642, than apply into the LCM equation.

GCF(15638,15642) = 2
LCM(15638,15642) = ( 15638 × 15642) / 2
LCM(15638,15642) = 244609596 / 2
LCM(15638,15642) = 122304798

Least Common Multiple (LCM) of 15638 and 15642 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 15638 and 15642. First we will calculate the prime factors of 15638 and 15642.

Prime Factorization of 15638

Prime Factorization of 15642

Now multiplying the highest exponent prime factors to calculate the LCM of 15638 and 15642.

LCM(15638,15642) = 2¹ × 7¹ × 1117¹ × 3² × 11¹ × 79¹
LCM(15638,15642) = 122304798