Created By : Jatin Gogia
Reviewed By : Rajasekhar Valipishetty
Last Updated : Apr 06, 2023
Free LCM Calculator determines the least common multiple (LCM) between 308 and 315 the smallest integer that is 13860 that is divisible by both numbers.
Least Common Multiple (LCM) of 308 and 315 is 13860.
LCM(308,315) = 13860
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 308 and 315. First we will calculate the prime factors of 308 and 315.
Prime Factorization of 308
2 | 308 |
2 | 154 |
7 | 77 |
11 | 11 |
1 |
Prime factors of 308 are 2, 7,11. Prime factorization of 308 in exponential form is:
308 = 22×71×111
Prime Factorization of 315
3 | 315 |
3 | 105 |
5 | 35 |
7 | 7 |
1 |
Prime factors of 315 are 3, 5,7. Prime factorization of 315 in exponential form is:
315 = 32×51×71
Now multiplying the highest exponent prime factors to calculate the LCM of 308 and 315.
LCM(308,315) = 22×32×51×71×111
LCM(308,315) = 13860
Factors of 308
List of positive integer factors of 308 that divides 308 without a remainder.
1, 2, 4, 7, 11, 14, 22, 28, 44, 77, 154, 308
Factors of 315
List of positive integer factors of 315 that divides 315 without a remainder.
1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 315
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 308 and 315, than apply into the LCM equation.
GCF(308,315) = 7
LCM(308,315) = ( 308 × 315) / 7
LCM(308,315) = 97020 / 7
LCM(308,315) = 13860
(i) The LCM of 315 and 308 is associative
LCM of 308 and 315 = LCM of 315 and 308
1. What is the LCM of 308 and 315?
Answer: LCM of 308 and 315 is 13860.
2. What are the Factors of 308?
Answer: Factors of 308 are 1, 2, 4, 7, 11, 14, 22, 28, 44, 77, 154, 308. There are 12 integers that are factors of 308. The greatest factor of 308 is 308.
3. What are the Factors of 315?
Answer: Factors of 315 are 1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 315. There are 12 integers that are factors of 315. The greatest factor of 315 is 315.
4. How to Find the LCM of 308 and 315?
Answer:
Least Common Multiple of 308 and 315 = 13860
Step 1: Find the prime factorization of 308
308 = 2 x 2 x 7 x 11
Step 2: Find the prime factorization of 315
315 = 3 x 3 x 5 x 7
Step 3: Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:
LCM = 13860 = 2 x 2 x 3 x 3 x 5 x 7 x 11
Step 4: Therefore, the least common multiple of 308 and 315 is 13860.