Created By : Jatin Gogia
Reviewed By : Rajasekhar Valipishetty
Last Updated : Apr 06, 2023
Free LCM Calculator determines the least common multiple (LCM) between 7805 and 7809 the smallest integer that is 60949245 that is divisible by both numbers.
Least Common Multiple (LCM) of 7805 and 7809 is 60949245.
LCM(7805,7809) = 60949245
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 7805 and 7809. First we will calculate the prime factors of 7805 and 7809.
Prime Factorization of 7805
5 | 7805 |
7 | 1561 |
223 | 223 |
1 |
Prime factors of 7805 are 5, 7,223. Prime factorization of 7805 in exponential form is:
7805 = 51×71×2231
Prime Factorization of 7809
3 | 7809 |
19 | 2603 |
137 | 137 |
1 |
Prime factors of 7809 are 3, 19,137. Prime factorization of 7809 in exponential form is:
7809 = 31×191×1371
Now multiplying the highest exponent prime factors to calculate the LCM of 7805 and 7809.
LCM(7805,7809) = 31×51×71×191×1371×2231
LCM(7805,7809) = 60949245
Factors of 7805
List of positive integer factors of 7805 that divides 7805 without a remainder.
1, 5, 7, 35, 223, 1115, 1561, 7805
Factors of 7809
List of positive integer factors of 7809 that divides 7809 without a remainder.
1, 3, 19, 57, 137, 411, 2603, 7809
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 7805 and 7809, than apply into the LCM equation.
GCF(7805,7809) = 1
LCM(7805,7809) = ( 7805 × 7809) / 1
LCM(7805,7809) = 60949245 / 1
LCM(7805,7809) = 60949245
(i) The LCM of 7809 and 7805 is associative
LCM of 7805 and 7809 = LCM of 7809 and 7805
1. What is the LCM of 7805 and 7809?
Answer: LCM of 7805 and 7809 is 60949245.
2. What are the Factors of 7805?
Answer: Factors of 7805 are 1, 5, 7, 35, 223, 1115, 1561, 7805. There are 8 integers that are factors of 7805. The greatest factor of 7805 is 7805.
3. What are the Factors of 7809?
Answer: Factors of 7809 are 1, 3, 19, 57, 137, 411, 2603, 7809. There are 8 integers that are factors of 7809. The greatest factor of 7809 is 7809.
4. How to Find the LCM of 7805 and 7809?
Answer:
Least Common Multiple of 7805 and 7809 = 60949245
Step 1: Find the prime factorization of 7805
7805 = 5 x 7 x 223
Step 2: Find the prime factorization of 7809
7809 = 3 x 19 x 137
Step 3: Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:
LCM = 60949245 = 3 x 5 x 7 x 19 x 137 x 223
Step 4: Therefore, the least common multiple of 7805 and 7809 is 60949245.