What is the Least Common Multiple of 42707 and 42721?

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 42707 and 42721 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 42707 and 42721, than apply into the LCM equation.

GCF(42707,42721) = 7
LCM(42707,42721) = ( 42707 × 42721) / 7
LCM(42707,42721) = 1824485747 / 7
LCM(42707,42721) = 260640821

Least Common Multiple (LCM) of 42707 and 42721 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 42707 and 42721. First we will calculate the prime factors of 42707 and 42721.

Prime Factorization of 42707

Prime Factorization of 42721

Now multiplying the highest exponent prime factors to calculate the LCM of 42707 and 42721.

LCM(42707,42721) = 7¹ × 6101¹ × 17¹ × 359¹
LCM(42707,42721) = 260640821