What is the Least Common Multiple of 42440 and 42455?

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 42440 and 42455 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 42440 and 42455, than apply into the LCM equation.

GCF(42440,42455) = 5
LCM(42440,42455) = ( 42440 × 42455) / 5
LCM(42440,42455) = 1801790200 / 5
LCM(42440,42455) = 360358040

Least Common Multiple (LCM) of 42440 and 42455 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 42440 and 42455. First we will calculate the prime factors of 42440 and 42455.

Prime Factorization of 42440

Prime Factorization of 42455

Now multiplying the highest exponent prime factors to calculate the LCM of 42440 and 42455.

LCM(42440,42455) = 2³ × 5¹ × 1061¹ × 7¹ × 1213¹
LCM(42440,42455) = 360358040