What is the Least Common Multiple of 21490 and 21497?

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 21490 and 21497 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21490 and 21497, than apply into the LCM equation.

GCF(21490,21497) = 7
LCM(21490,21497) = ( 21490 × 21497) / 7
LCM(21490,21497) = 461970530 / 7
LCM(21490,21497) = 65995790

Least Common Multiple (LCM) of 21490 and 21497 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21490 and 21497. First we will calculate the prime factors of 21490 and 21497.

Prime Factorization of 21490

Prime Factorization of 21497

Now multiplying the highest exponent prime factors to calculate the LCM of 21490 and 21497.

LCM(21490,21497) = 2¹ × 5¹ × 7¹ × 307¹ × 37¹ × 83¹
LCM(21490,21497) = 65995790