What is the Least Common Multiple of 21957 and 21970?

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 21957 and 21970 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21957 and 21970, than apply into the LCM equation.

GCF(21957,21970) = 13
LCM(21957,21970) = ( 21957 × 21970) / 13
LCM(21957,21970) = 482395290 / 13
LCM(21957,21970) = 37107330

Least Common Multiple (LCM) of 21957 and 21970 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21957 and 21970. First we will calculate the prime factors of 21957 and 21970.

Prime Factorization of 21957

Prime Factorization of 21970

Now multiplying the highest exponent prime factors to calculate the LCM of 21957 and 21970.

LCM(21957,21970) = 3¹ × 13³ × 563¹ × 2¹ × 5¹
LCM(21957,21970) = 37107330