What is the Least Common Multiple of 39638 and 39646?

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 39638 and 39646 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 39638 and 39646, than apply into the LCM equation.

GCF(39638,39646) = 2
LCM(39638,39646) = ( 39638 × 39646) / 2
LCM(39638,39646) = 1571488148 / 2
LCM(39638,39646) = 785744074

Least Common Multiple (LCM) of 39638 and 39646 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 39638 and 39646. First we will calculate the prime factors of 39638 and 39646.

Prime Factorization of 39638

Prime Factorization of 39646

Now multiplying the highest exponent prime factors to calculate the LCM of 39638 and 39646.

LCM(39638,39646) = 2¹ × 19819¹ × 43¹ × 461¹
LCM(39638,39646) = 785744074