Created By : Jatin Gogia
Reviewed By : Rajasekhar Valipishetty
Last Updated : Apr 06, 2023
Free LCM Calculator determines the least common multiple (LCM) between 8421 and 8425 the smallest integer that is 70946925 that is divisible by both numbers.
Least Common Multiple (LCM) of 8421 and 8425 is 70946925.
LCM(8421,8425) = 70946925
Least common multiple or lowest common denominator (LCD) can be calculated in three ways;
Least common multiple can be found by multiplying the highest exponent prime factors of 8421 and 8425. First we will calculate the prime factors of 8421 and 8425.
Prime Factorization of 8421
3 | 8421 |
7 | 2807 |
401 | 401 |
1 |
Prime factors of 8421 are 3, 7,401. Prime factorization of 8421 in exponential form is:
8421 = 31×71×4011
Prime Factorization of 8425
5 | 8425 |
5 | 1685 |
337 | 337 |
1 |
Prime factors of 8425 are 5,337. Prime factorization of 8425 in exponential form is:
8425 = 52×3371
Now multiplying the highest exponent prime factors to calculate the LCM of 8421 and 8425.
LCM(8421,8425) = 31×52×71×3371×4011
LCM(8421,8425) = 70946925
Factors of 8421
List of positive integer factors of 8421 that divides 8421 without a remainder.
1, 3, 7, 21, 401, 1203, 2807, 8421
Factors of 8425
List of positive integer factors of 8425 that divides 8425 without a remainder.
1, 5, 25, 337, 1685, 8425
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 8421 and 8425, than apply into the LCM equation.
GCF(8421,8425) = 1
LCM(8421,8425) = ( 8421 × 8425) / 1
LCM(8421,8425) = 70946925 / 1
LCM(8421,8425) = 70946925
(i) The LCM of 8425 and 8421 is associative
LCM of 8421 and 8425 = LCM of 8425 and 8421
1. What is the LCM of 8421 and 8425?
Answer: LCM of 8421 and 8425 is 70946925.
2. What are the Factors of 8421?
Answer: Factors of 8421 are 1, 3, 7, 21, 401, 1203, 2807, 8421. There are 8 integers that are factors of 8421. The greatest factor of 8421 is 8421.
3. What are the Factors of 8425?
Answer: Factors of 8425 are 1, 5, 25, 337, 1685, 8425. There are 6 integers that are factors of 8425. The greatest factor of 8425 is 8425.
4. How to Find the LCM of 8421 and 8425?
Answer:
Least Common Multiple of 8421 and 8425 = 70946925
Step 1: Find the prime factorization of 8421
8421 = 3 x 7 x 401
Step 2: Find the prime factorization of 8425
8425 = 5 x 5 x 337
Step 3: Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:
LCM = 70946925 = 3 x 5 x 5 x 7 x 337 x 401
Step 4: Therefore, the least common multiple of 8421 and 8425 is 70946925.