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Q: What is a number with only four factors?

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There are an infinite number of numbers with only four factors, started by 6, 8 and 10.

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.

10

The number 21 has only four factors: 1, 3, 7, and 21. Many number have more than four factors. Among them are 1x2x3x4x5 = 120.

14

The one with only two factors.

The only proper factor of four is two.

16 is a number that has four identical even factors.

15 has four factors.

Four factors.

Four factors.

10 has four factors.

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.

The number four.

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 has only three factors: 1 2 4.

16 does not have four prime factors, only one.

No. A prime number can only be divided equally by 1 and itself. It has no other factors. 2 is a factor of 4.

A number that has only two factors is called a prime. The only factors of a prime are 1 and the number itself.

There is more than one possible answer. The prime factors of 16 are 2, 2, 2, and 2. It has four prime factors, but only one distinct prime factor. The prime factors of 24 are 2, 2, 2, and 3. It has four prime factors, but only two distinct prime factors. The prime factors of 36 are 2, 2, 3, and 3. It has four prime factors, but only two distinct prime factors. The prime factors of 40 are 2, 2, 2, and 5. It has four prime factors, but only two distinct prime factors. The prime factors of 54 are 2, 3, 3, and 3. It has four prime factors, but only two distinct prime factors. The prime factors of 56 are 2, 2, 2, and 7. It has four prime factors, but only two distinct prime factors. The prime factors of 60 are 2, 2, 3, and 5. It has four prime factors, but only three distinct prime factors. The prime factors of 81 are 3, 3, 3, and 3. It has four prime factors, but only one distinct prime factor. The prime factors of 84 are 2, 2, 3, and 7. It has four prime factors, but only three distinct prime factors. The prime factors of 88 are 2, 2, 2, and 11. It has four prime factors, but only two distinct prime factors. The prime factors of 90 are 2, 3, 3, and 5. It has four prime factors, but only three distinct prime factors.

20 has six factors.

Any prime number, a prime number is a number of which the only factors are it and itself.

The number 9: factors are 9, 3, and 1.

Four