What is the Least Common Multiple of 42815 and 42821?

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 42815 and 42821 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 42815 and 42821, than apply into the LCM equation.

GCF(42815,42821) = 1
LCM(42815,42821) = ( 42815 × 42821) / 1
LCM(42815,42821) = 1833381115 / 1
LCM(42815,42821) = 1833381115

Least Common Multiple (LCM) of 42815 and 42821 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 42815 and 42821. First we will calculate the prime factors of 42815 and 42821.

Prime Factorization of 42815

Prime Factorization of 42821

Now multiplying the highest exponent prime factors to calculate the LCM of 42815 and 42821.

LCM(42815,42821) = 5¹ × 8563¹ × 42821¹
LCM(42815,42821) = 1833381115