### What are the prime factors of 45?

The Prime Factors of 45 are 1, 3, and 5. In order to find the prime factors of 45, you need to find the factors of 45. The factors are: 1, 3, 5, 9, 15, and 45. The prime factors of 45 are those that have only 1 and the number itself as factors, so they are 3 and 5. Some think 1 is also a prime number, but it's neither prime nor composite.

### Is 45 a prime or composite number?

Composite 45 is a composite number. A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 have a different name. 45 is composite. It is divisible by 3, 5, and 9, which makes it composite, as well as by 1 and 45, which if alone would make it prime.

### In how many ways can 47 be written as the sum of two prime numbers?

It cannot be. If 47 is the sum of two prime numbers, one must be an even number and one must be an odd number, because that is the only way to have a sum that is an odd number, such as 47. The only even prime number is 2. The number that with 2 will have a sum of 47 is 45. However, 45 is not a prime number. Therefore, there are not two…

### How do you get the prime factorization of 90?

Prime Factorization of 90 To find the prime factorization of 90, start with the lowest prime number that will divide into 90. That number is 2. 2 times 45 equals 90. 2 is a number in the prime factorization of 90. Next, find the lowest prime number that will divide into 45. The number is 3, and 3 times15 equals 45. 3 is one of the prime factors, so now you have 2 times 3…

### What is the gfc of 45 and 75?

GCF stands for Greatest Common Factor. This means that the GCF of 45 and 75 will be the greatest common factor of 45 and 75. The prime factorization of 45 is 3^2*5. Thus, a number is a factor of 45 if and only if it does not have more than 2 3s in its prime factorization, more than one 5 in its prime factorization, or any other prime factor. The prime factorization of 75 is…