What is the smallest prime number for 15?
Prime numbers less than 15 are 2, 3, 5, 7, 11, and 13. Now, try to divide 15 with the above prime numbers. 15 ÷ 2 = 7.5, but we know that a factor cannot be a decimal number. 15 ÷ 3 = 5; we have 5 as the answer, thus, 5 is the factor of 15.
What is the smallest factor of 15?
Among all, 15 is the smallest factor. So, 1 is the smallest factor of 15.
What is the smallest prime factor?
2
Answer: 2 is the smallest prime number.
How many prime factors are there of the number 15?
1 to 100
| 1 | |
|---|---|
| 13 | 13 |
| 14 | 2·7 |
| 15 | 3·5 |
| 16 | 24 |
How do you find all the factors of 15?
15 = 1 x 15 or 3 x 5. Factors of 15: 1, 3, 5, 15.
What can make 15?
List of Factor Pairs for 15
- 1 x 15 = 15.
- 3 x 5 = 15.
- 5 x 3 = 15.
- 15 x 1 = 15.
How do you find the smallest prime factor of a number?
Approach:
- Check if the number is divisible by 2 or not.
- Iterate from i = 3 to sqrt(N) and making a jump of 2.
- If any of the numbers divide N then it is the smallest prime divisor.
- If none of them divide, then N is the answer.
What is the multiple of 15?
The first 5 multiples of 15 are 15, 30, 45, 60 and 90.
How do you find the smallest factor?
The quickest way to find the factors of a number is to divide it by the smallest prime number (bigger than 1) that goes into it evenly with no remainder. Continue this process with each number you get, until you reach 1.
What are the 2 smallest prime numbers?
Explanation: The third smallest prime number is 5. (Don’t forget that 2 is a prime number, but 1 is not!) The smallest two digit prime number is 11.
What do numbers with 15 factors look like?
Table of Factors and Multiples
| Factors | Multiples | |
|---|---|---|
| 1, 13 | 13 | 104 |
| 1, 2, 7, 14 | 14 | 112 |
| 1, 3, 5, 15 | 15 | 120 |
| 1, 2, 4, 8, 16 | 16 | 128 |
What are the first 15 prime factors?
2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47…..
Which of the following is the prime factor of 15?
Where as for prime numbers, the one and only prime factor is itself since 1 is not a prime factor. Hence we go for the prime factors of 15 are 3 and 5.
What are the factors of 15?
The factors of 15 are 1, 3, 5 and 15. Now, as 1 is neither prime and nor a composite number (1 is not Prime because for a number to be a prime, it should have exact 2 factors i.e. 1 and itself, but 1 has only one factor.
What is the LCM of 10 15 and 20 by prime factorization?
Prime factorization of 10, 15, and 20 is (2 × 5) = 2 1 × 5 1, (3 × 5) = 3 1 × 5 1, and (2 × 2 × 5) = 2 2 × 5 1 respectively. LCM of 10, 15, and 20 can be obtained by multiplying prime factors raised to their respective highest power, i.e. 2 2 × 3 1 × 5 1 = 60. Hence, the LCM of 10, 15, and 20 by prime factorization is 60.
What are the factors of 15 and 24?
The factors of 15 are: 1, 3, 5, 15 The factors of 24 are: 1, 2, 3, 4, 6, 8, 12, 24 What factors are common to 15 and 30? The common factors of 15 and 30 are 1, 3, 5, and 15 since the factors of 15 are 1, 3, 5, 15, whereas the factors of 30 are 1, 2, 3, 5, 6, 10, 15, 30.