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.
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.
The number 21 has only four factors: 1, 3, 7, and 21. Many number have more than four factors. Among them are 1x2x3x4x5 = 120.
10
The one with only two factors.
The only proper factor of four is two.
14
53 is the only prime number out of the four numbers because it has only two factors.
10, which has the factors 1,2,5 and 10. If the trivial pair 1 and the number itself are disallowed, the answer is 12 with factors 2,3,4 and 6.
16 is a number that has four identical even factors.
15 has four factors.
If factors include 1 and the number itself then the any number (n) with only 4 factors has to be the product of two prime numbers, p1 and p2. The factors are then n, p1, p2, and 1. The largest 3-digit number with only 4 factors is 998. The factors are 998, 499, 2 and 1
Four factors.