Numbers with exactly three factors are squares of prime numbers.
4, 9 and 25.
Numbers with three factors are squares of primes. So: 4, 9, 25
All numbers that are the square of primes have exactly 3 factors.
4, 9, 25, 49
8 10 12 and 13
4 and 9
Numbers with exactly three factors are squares of prime numbers.
Squares of prime numbers have exactly three factors.
4, 9 and 25.
2 4 6
Squares of prime numbers, like 4, 9 and 25.
4 (factors 1, 2 and 4) and 9 (factors 1, 3 and 9) are two examples.
Numbers with three factors are squares of primes. So: 4, 9, 25
Prime numbers have exactly two factors. 3 has exactly two factors: 1 and 3. So 3 is prime. Composite numbers have more than two factors. 4 is composite because it has three factors: 1, 2, and 4.
All numbers that are the square of primes have exactly 3 factors.
All numbers that have exactly two factors are prime numbers whereas composite numbers have more than two factors.