What is the Least Common Multiple of 455 and 470?

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 455 and 470 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 455 and 470, than apply into the LCM equation.

GCF(455,470) = 5
LCM(455,470) = ( 455 × 470) / 5
LCM(455,470) = 213850 / 5
LCM(455,470) = 42770

Least Common Multiple (LCM) of 455 and 470 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 455 and 470. First we will calculate the prime factors of 455 and 470.

Prime Factorization of 455

Prime Factorization of 470

Now multiplying the highest exponent prime factors to calculate the LCM of 455 and 470.

LCM(455,470) = 5¹ × 7¹ × 13¹ × 2¹ × 47¹
LCM(455,470) = 42770