What is the Least Common Multiple of 15620 and 15638?

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 15620 and 15638 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 15620 and 15638, than apply into the LCM equation.

GCF(15620,15638) = 2
LCM(15620,15638) = ( 15620 × 15638) / 2
LCM(15620,15638) = 244265560 / 2
LCM(15620,15638) = 122132780

Least Common Multiple (LCM) of 15620 and 15638 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 15620 and 15638. First we will calculate the prime factors of 15620 and 15638.

Prime Factorization of 15620

Prime Factorization of 15638

Now multiplying the highest exponent prime factors to calculate the LCM of 15620 and 15638.

LCM(15620,15638) = 2² × 5¹ × 11¹ × 71¹ × 7¹ × 1117¹
LCM(15620,15638) = 122132780