Created By : Jatin Gogia
Reviewed By : Rajasekhar Valipishetty
Last Updated : Apr 06, 2023
Free LCM Calculator determines the least common multiple (LCM) between 104 and 105 the smallest integer that is 10920 that is divisible by both numbers.
Least Common Multiple (LCM) of 104 and 105 is 10920.
LCM(104,105) = 10920
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 104 and 105. First we will calculate the prime factors of 104 and 105.
Prime Factorization of 104
2 | 104 |
2 | 52 |
2 | 26 |
13 | 13 |
1 |
Prime factors of 104 are 2,13. Prime factorization of 104 in exponential form is:
104 = 23×131
Prime Factorization of 105
3 | 105 |
5 | 35 |
7 | 7 |
1 |
Prime factors of 105 are 3, 5,7. Prime factorization of 105 in exponential form is:
105 = 31×51×71
Now multiplying the highest exponent prime factors to calculate the LCM of 104 and 105.
LCM(104,105) = 23×31×51×71×131
LCM(104,105) = 10920
Factors of 104
List of positive integer factors of 104 that divides 104 without a remainder.
1, 2, 4, 8, 13, 26, 52, 104
Factors of 105
List of positive integer factors of 105 that divides 105 without a remainder.
1, 3, 5, 7, 15, 21, 35, 105
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 104 and 105, than apply into the LCM equation.
GCF(104,105) = 1
LCM(104,105) = ( 104 × 105) / 1
LCM(104,105) = 10920 / 1
LCM(104,105) = 10920
(i) The LCM of 105 and 104 is associative
LCM of 104 and 105 = LCM of 105 and 104
1. What is the LCM of 104 and 105?
Answer: LCM of 104 and 105 is 10920.
2. What are the Factors of 104?
Answer: Factors of 104 are 1, 2, 4, 8, 13, 26, 52, 104. There are 8 integers that are factors of 104. The greatest factor of 104 is 104.
3. What are the Factors of 105?
Answer: Factors of 105 are 1, 3, 5, 7, 15, 21, 35, 105. There are 8 integers that are factors of 105. The greatest factor of 105 is 105.
4. How to Find the LCM of 104 and 105?
Answer:
Least Common Multiple of 104 and 105 = 10920
Step 1: Find the prime factorization of 104
104 = 2 x 2 x 2 x 13
Step 2: Find the prime factorization of 105
105 = 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 = 10920 = 2 x 2 x 2 x 3 x 5 x 7 x 13
Step 4: Therefore, the least common multiple of 104 and 105 is 10920.