25
Well, the factors of a prime number is that they only have two factors.
Okay, whoever said that a number can only have an even number of factors IS Wrong Take a prime number and square it. If you square a prime number, the number you get will only have 3 factors. For example, if I squared the number 3, I would get 9. 9 only has three factors: 9, 3, 1 Any prime number squared has Three factors.
1 is the only number between 1 and 100 that has too few factors to be a prime number.
It is 103 which is a prime number because it has only two factors which are itself and one
101 is the first three-digit prime number.
25
The number that has only three factors between 12 and 40 is 16. The factors of 16 are 1, 2, 4, 8, and 16. Since 16 has only three distinct factors (1, 2, and 4), it meets the criteria specified.
A square number
Square numbers have an odd number of factors. Other numbers have an even number of factors. The squares between 12 and 40 include 16, 25, and 36. If the number has only three factors, it must be the square of a prime number, since two of the factors will be 1 and itself, so if there is only one more factor, this third number cannot have factors itself. This means the number must be 25, whose factors are 1, 5, and 25. Response: 24 has (at least) three factors - 1, 2, 3, 4, 6, 8, 12, and 24 .
The numbers with only three factors are squares of prime numbers.
Well, the factors of a prime number is that they only have two factors.
Okay, whoever said that a number can only have an even number of factors IS Wrong Take a prime number and square it. If you square a prime number, the number you get will only have 3 factors. For example, if I squared the number 3, I would get 9. 9 only has three factors: 9, 3, 1 Any prime number squared has Three factors.
3 is a prime number; its only factors are 1 and itself.
A number has exactly three factors if and only if it is the square of a prime number.
1 is the only number between 1 and 100 that has too few factors to be a prime number.
Squares of prime numbers are the only numbers with three factors, since there must be only one nontrivial divisor for a number to have three factors. That number must thus be prime.
17 If the number has only two factors, it must be a prime number. The only factors of 17 are 1 and 17. The difference between 1 and 17 is 16.