A perfect square
The one digit number that has the same number of factors as the number six is three. Six's factors are 1, 2, 3, and 6 while three's factors are 1 and 3. Therefore, both numbers have the same number of factors.
Another name for that would be a square.
20 and 28 both have six factors.
A square number
They are called common factors when they are the same for two or more numbers. They are factors that are common to both number.
A prime factorization is the same as expressing a composite number as the product of its prime factors. Prime numbers don't have factorizations; they're already prime.
If you are talking about the number itself, they can be the same. To be specific: A prime number is a number that only has the factors 1 and itself. A factor is a number that when multiplied creates a product. A prime factor is a prime number that is multiplied to create a product.
20 and 28 both have six factors.
If you multiply a number by itself, you can also call it the square of the number, the second power of the number, or the number to the power 2.
They ARE the same.
If the signs of both numbers are the same, the product will be positive. If the signs of the numbers are different, the product will be negative.