What is the Least Common Multiple of 1715 and 1722?

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 1715 and 1722 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 1715 and 1722, than apply into the LCM equation.

GCF(1715,1722) = 7
LCM(1715,1722) = ( 1715 × 1722) / 7
LCM(1715,1722) = 2953230 / 7
LCM(1715,1722) = 421890

Least Common Multiple (LCM) of 1715 and 1722 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 1715 and 1722. First we will calculate the prime factors of 1715 and 1722.

Prime Factorization of 1715

Prime Factorization of 1722

Now multiplying the highest exponent prime factors to calculate the LCM of 1715 and 1722.

LCM(1715,1722) = 5¹ × 7³ × 2¹ × 3¹ × 41¹
LCM(1715,1722) = 421890