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30, 42, 66, 70 and 78.
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How many number under 10 have 2 factors?
There are 4 prime numbers under ten.
What prime number under 20 can be expressed as the sum of three different prime numbers?
They are: 3+5+11 = 19
What are 3 numbers under 100 that have exactly 4 factors?
Such a number would either have to be a perfect cube of a prime number, such as 33 = 27 (the only one in the specified range), or the product of exactly two different prime factors, such as 2 x 3, 2 x 5, 3 x 31, etc.
What numbers under 100.prime have 3 prime factors?
Numbers under 100 with three different prime factors are 30, 42, 66, 70 and 78. Numbers under 100 with three different prime factors, at least one of which has multiplicity > 1 are 8, 12, 18, 20, 27, 28, 44, 45, 50, 52, 63, 68, 75, 76, 92, 98 and 99.
Are prime numbers is closed under multilplication?
By definition, a product of two primes has atwo factors (other than 1 and itself) and so it cannot be prime. So the set is not closed.
What are the prime numbers under 100 that have 2 and 7 as factors?
There are no prime numbers anywhere that are divisible by 2 and 7.
How many number under 10 have 2 factors?
There are 4 prime numbers under ten.
Prime numbers under 6?
Prime Numbers under 6 are 2,3,5
How many prime numbers are under 140?
There are 34 prime numbers under 140.
What prime number under 1000 has the most different prime factors?
Ur mu m Isn't this great? She's had sooooo many children, they are all her factors
What number under 300 has the most unique prime factors?
Here is how you can calculate that: Multiply different prime numbers together, until your product exceeds the number 300. Then, you go back one step.
What are all the prime numbers under 16?
The prime numbers under 16 are 2,3,5,7,11 & 13.
What prime number under 20 can be expressed as the sum of three different prime numbers?
They are: 3+5+11 = 19
What is the prime factorization of numbers 1 to 200?
If you look at the related question, "What are the prime factors of the numbers from 1 to 200?" (provided in the link below), take the prime numbers, and show them with multiplication signs between them, then you will have the prime factorization. Examples: The prime factors of 15 are 3 and 5. Therefore, the prime factorization is 3 x 5. The prime factors of 42 are 2, 3, and 7. Therefore, the prime factorization is 2 x 3 x 7. The prime factors of 64 are 2, 2, 2, 2, 2, and 2. Therefore, the prime factorization is 2 x 2 x 2 x 2 x 2 x 2. If you want the prime factorization of a specific number, it is sometimes listed under questions of the form, "What are the prime factors of __?" or "What are the factors of __?" or "What are the factors and prime factors of __?"
What are 2 numbers under 50 that have exactly 3 factors?
The prime squares, like 4, 9, 25 and 49
Multiples of Prime numbers under 20?
All the numbers from 2 to 19 are multiples of prime numbers.
How many prime numbers are there till 1000?
168 prime numbers under 1000.
