Created By : Jatin Gogia
Reviewed By : Rajasekhar Valipishetty
Last Updated : Apr 06, 2023
Free LCM Calculator determines the least common multiple (LCM) between 689 and 695 the smallest integer that is 478855 that is divisible by both numbers.
Least Common Multiple (LCM) of 689 and 695 is 478855.
LCM(689,695) = 478855
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 689 and 695. First we will calculate the prime factors of 689 and 695.
Prime Factorization of 689
13 | 689 |
53 | 53 |
1 |
Prime factors of 689 are 13,53. Prime factorization of 689 in exponential form is:
689 = 131×531
Prime Factorization of 695
5 | 695 |
139 | 139 |
1 |
Prime factors of 695 are 5,139. Prime factorization of 695 in exponential form is:
695 = 51×1391
Now multiplying the highest exponent prime factors to calculate the LCM of 689 and 695.
LCM(689,695) = 51×131×531×1391
LCM(689,695) = 478855
Factors of 689
List of positive integer factors of 689 that divides 689 without a remainder.
1, 13, 53, 689
Factors of 695
List of positive integer factors of 695 that divides 695 without a remainder.
1, 5, 139, 695
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 689 and 695, than apply into the LCM equation.
GCF(689,695) = 1
LCM(689,695) = ( 689 × 695) / 1
LCM(689,695) = 478855 / 1
LCM(689,695) = 478855
(i) The LCM of 695 and 689 is associative
LCM of 689 and 695 = LCM of 695 and 689
1. What is the LCM of 689 and 695?
Answer: LCM of 689 and 695 is 478855.
2. What are the Factors of 689?
Answer: Factors of 689 are 1, 13, 53, 689. There are 4 integers that are factors of 689. The greatest factor of 689 is 689.
3. What are the Factors of 695?
Answer: Factors of 695 are 1, 5, 139, 695. There are 4 integers that are factors of 695. The greatest factor of 695 is 695.
4. How to Find the LCM of 689 and 695?
Answer:
Least Common Multiple of 689 and 695 = 478855
Step 1: Find the prime factorization of 689
689 = 13 x 53
Step 2: Find the prime factorization of 695
695 = 5 x 139
Step 3: Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:
LCM = 478855 = 5 x 13 x 53 x 139
Step 4: Therefore, the least common multiple of 689 and 695 is 478855.