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A number with two prime factors that are not the same will have only four factors. It will have 1, itself, and those two prime factors as its factors.
Examples:
6 = 2 x 3. Its factors are 1, 2, 3, and 6.
15 = 3 x 5. Its factors are 1, 3, 5, and 15.
77 = 7 x 11. Its factors are 1, 7, 11, and 77.
Counter-examples:
4 = 2 x 2. Its factors are 1, 2, and 4.
12 = 2 x 2 x 3. Its factors are 1, 2, 3, 4, 6, and 12.
30 = 2 x 3 x 5. Its factors are 1, 2, 3, 5, 6, 10, 15, and 30.
45 = 3 x 3 x 5. Its factors are 1, 3, 5, 9, 15, and 45.
What else can I help you with?
What Is smallest composite number that has at least four different factors?
All composite numbers have more than 2 factors whereas prime numbers have only 2 factors
What are the 20 factors of 85 with the numbers 50 25 15 5?
85 has four factors.
Why are there only four factors for 20?
20 has six factors.
numbers with 2 3 5 as factors?
Of the numbers from 1 to 30, only 30 has all three of those numbers as factors.
What are the first ten factors of 8?
8 only has four factors.
Why does 133 and 39 have 4 factors?
Because there are only four numbers that divide into those numbers evenly.
What are some some numbers with four factors?
6, 8 and 10 are some numbers with four factors.
Why are 2 3 5 and 7 the first four prime numbers?
Because they have only two factors whereas composite numbers have more than two factors
What is the next four numbers with only two factors of 16?
18, 22, 26 and 30 have two of the same factors as 16.
Numbers with only 2 factors are called?
Numbers having only 2 factors are prime numbers. Their only factors are 1 and themselves. Prime numbers. The only two factors should be 1 and itself.
What are numbers that have 2 factors?
Numbers that have only 2 factors are prime numbers
What numbers have just two factors?
Prime numbers have only two factors, 1 and themselves, so only prime numbers could have only two factors
Which is a prime number 53 57 81 93?
53 is the only prime number out of the four numbers because it has only two factors.
Do only square numbers have an even number of factors?
No, only square numbers have an odd number of factors.
How many whole numbers are factors of 15?
Four
What is call to the numbers that have only one and themselves as factors?
Numbers whose factors only include one and themselves are called Prime numbers.
Three greatest common factors of 4?
Four only has three factors: 1, 2 and 4. For any of them to be a GCF, they need to be compared to another set of numbers.
