What is the Least Common Multiple of 21055 and 21070?

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 21055 and 21070 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21055 and 21070, than apply into the LCM equation.

GCF(21055,21070) = 5
LCM(21055,21070) = ( 21055 × 21070) / 5
LCM(21055,21070) = 443628850 / 5
LCM(21055,21070) = 88725770

Least Common Multiple (LCM) of 21055 and 21070 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21055 and 21070. First we will calculate the prime factors of 21055 and 21070.

Prime Factorization of 21055

Prime Factorization of 21070

Now multiplying the highest exponent prime factors to calculate the LCM of 21055 and 21070.

LCM(21055,21070) = 5¹ × 4211¹ × 2¹ × 7² × 43¹
LCM(21055,21070) = 88725770