What is the Least Common Multiple of 61421 and 61438?

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 61421 and 61438 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 61421 and 61438, than apply into the LCM equation.

GCF(61421,61438) = 17
LCM(61421,61438) = ( 61421 × 61438) / 17
LCM(61421,61438) = 3773583398 / 17
LCM(61421,61438) = 221975494

Least Common Multiple (LCM) of 61421 and 61438 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 61421 and 61438. First we will calculate the prime factors of 61421 and 61438.

Prime Factorization of 61421

Prime Factorization of 61438

Now multiplying the highest exponent prime factors to calculate the LCM of 61421 and 61438.

LCM(61421,61438) = 17¹ × 3613¹ × 2¹ × 13¹ × 139¹
LCM(61421,61438) = 221975494