Any number that is the product of two primes (excluding itself and 1) has 4 factors. For example 21 has 4 factors: 1, 3, 7, 21; of which 3 and 7 are both prime.
Chat with our AI personalities
A number that has only one and itself as factors is a prime number and so therefore it can't have four other identical factors.
Four has only three factors: 1 2 4.
210 is the number whose prime factors are the first four primes unrepeated.
The only number that has 2 factors is the number 2.
Well, the factors of a prime number is that they only have two factors.