What is the Least Common Multiple of 17940 and 17960?

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 17940 and 17960 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 17940 and 17960, than apply into the LCM equation.

GCF(17940,17960) = 20
LCM(17940,17960) = ( 17940 × 17960) / 20
LCM(17940,17960) = 322202400 / 20
LCM(17940,17960) = 16110120

Least Common Multiple (LCM) of 17940 and 17960 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 17940 and 17960. First we will calculate the prime factors of 17940 and 17960.

Prime Factorization of 17940

Prime Factorization of 17960

Now multiplying the highest exponent prime factors to calculate the LCM of 17940 and 17960.

LCM(17940,17960) = 2³ × 3¹ × 5¹ × 13¹ × 23¹ × 449¹
LCM(17940,17960) = 16110120