What is the Least Common Multiple of 21765 and 21770?

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 21765 and 21770 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21765 and 21770, than apply into the LCM equation.

GCF(21765,21770) = 5
LCM(21765,21770) = ( 21765 × 21770) / 5
LCM(21765,21770) = 473824050 / 5
LCM(21765,21770) = 94764810

Least Common Multiple (LCM) of 21765 and 21770 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21765 and 21770. First we will calculate the prime factors of 21765 and 21770.

Prime Factorization of 21765

Prime Factorization of 21770

Now multiplying the highest exponent prime factors to calculate the LCM of 21765 and 21770.

LCM(21765,21770) = 3¹ × 5¹ × 1451¹ × 2¹ × 7¹ × 311¹
LCM(21765,21770) = 94764810