Created By : Jatin Gogia
Reviewed By : Rajasekhar Valipishetty
Last Updated : Apr 06, 2023
Free LCM Calculator determines the least common multiple (LCM) between 4 and 22 the smallest integer that is 44 that is divisible by both numbers.
Least Common Multiple (LCM) of 4 and 22 is 44.
LCM(4,22) = 44
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 4 and 22. First we will calculate the prime factors of 4 and 22.
Prime Factorization of 4
2 | 4 |
2 | 2 |
1 |
Prime factors of 4 are 2. Prime factorization of 4 in exponential form is:
4 = 22
Prime Factorization of 22
2 | 22 |
11 | 11 |
1 |
Prime factors of 22 are 2,11. Prime factorization of 22 in exponential form is:
22 = 21×111
Now multiplying the highest exponent prime factors to calculate the LCM of 4 and 22.
LCM(4,22) = 22×111
LCM(4,22) = 44
Factors of 4
List of positive integer factors of 4 that divides 4 without a remainder.
1, 2, 4
Factors of 22
List of positive integer factors of 22 that divides 22 without a remainder.
1, 2, 11, 22
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 4 and 22, than apply into the LCM equation.
GCF(4,22) = 2
LCM(4,22) = ( 4 × 22) / 2
LCM(4,22) = 88 / 2
LCM(4,22) = 44
(i) The LCM of 22 and 4 is associative
LCM of 4 and 22 = LCM of 22 and 4
1. What is the LCM of 4 and 22?
Answer: LCM of 4 and 22 is 44.
2. What are the Factors of 4?
Answer: Factors of 4 are 1, 2, 4. There are 3 integers that are factors of 4. The greatest factor of 4 is 4.
3. What are the Factors of 22?
Answer: Factors of 22 are 1, 2, 11, 22. There are 4 integers that are factors of 22. The greatest factor of 22 is 22.
4. How to Find the LCM of 4 and 22?
Answer:
Least Common Multiple of 4 and 22 = 44
Step 1: Find the prime factorization of 4
4 = 2 x 2
Step 2: Find the prime factorization of 22
22 = 2 x 11
Step 3: Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:
LCM = 44 = 2 x 2 x 11
Step 4: Therefore, the least common multiple of 4 and 22 is 44.