What is the Least Common Multiple of 42445 and 42458?

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 42445 and 42458 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 42445 and 42458, than apply into the LCM equation.

GCF(42445,42458) = 13
LCM(42445,42458) = ( 42445 × 42458) / 13
LCM(42445,42458) = 1802129810 / 13
LCM(42445,42458) = 138625370

Least Common Multiple (LCM) of 42445 and 42458 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 42445 and 42458. First we will calculate the prime factors of 42445 and 42458.

Prime Factorization of 42445

Prime Factorization of 42458

Now multiplying the highest exponent prime factors to calculate the LCM of 42445 and 42458.

LCM(42445,42458) = 5¹ × 13¹ × 653¹ × 2¹ × 23¹ × 71¹
LCM(42445,42458) = 138625370