Created By : Jatin Gogia
Reviewed By : Rajasekhar Valipishetty
Last Updated : Apr 06, 2023
Free LCM Calculator determines the least common multiple (LCM) between 620 and 625 the smallest integer that is 77500 that is divisible by both numbers.
Least Common Multiple (LCM) of 620 and 625 is 77500.
LCM(620,625) = 77500
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 620 and 625. First we will calculate the prime factors of 620 and 625.
Prime Factorization of 620
2 | 620 |
2 | 310 |
5 | 155 |
31 | 31 |
1 |
Prime factors of 620 are 2, 5,31. Prime factorization of 620 in exponential form is:
620 = 22×51×311
Prime Factorization of 625
5 | 625 |
5 | 125 |
5 | 25 |
5 | 5 |
1 |
Prime factors of 625 are 5. Prime factorization of 625 in exponential form is:
625 = 54
Now multiplying the highest exponent prime factors to calculate the LCM of 620 and 625.
LCM(620,625) = 22×54×311
LCM(620,625) = 77500
Factors of 620
List of positive integer factors of 620 that divides 620 without a remainder.
1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620
Factors of 625
List of positive integer factors of 625 that divides 625 without a remainder.
1, 5, 25, 125, 625
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 620 and 625, than apply into the LCM equation.
GCF(620,625) = 5
LCM(620,625) = ( 620 × 625) / 5
LCM(620,625) = 387500 / 5
LCM(620,625) = 77500
(i) The LCM of 625 and 620 is associative
LCM of 620 and 625 = LCM of 625 and 620
1. What is the LCM of 620 and 625?
Answer: LCM of 620 and 625 is 77500.
2. What are the Factors of 620?
Answer: Factors of 620 are 1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620. There are 12 integers that are factors of 620. The greatest factor of 620 is 620.
3. What are the Factors of 625?
Answer: Factors of 625 are 1, 5, 25, 125, 625. There are 5 integers that are factors of 625. The greatest factor of 625 is 625.
4. How to Find the LCM of 620 and 625?
Answer:
Least Common Multiple of 620 and 625 = 77500
Step 1: Find the prime factorization of 620
620 = 2 x 2 x 5 x 31
Step 2: Find the prime factorization of 625
625 = 5 x 5 x 5 x 5
Step 3: Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:
LCM = 77500 = 2 x 2 x 5 x 5 x 5 x 5 x 31
Step 4: Therefore, the least common multiple of 620 and 625 is 77500.