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# What numbers between 1 and 20 only have 2 factors?

Updated: 4/28/2022

Wiki User

13y ago

2,3,5,7,11,13,17 &19 - they're all the prime numbers !

Wiki User

13y ago

Wiki User

9y ago

They are the prime numbers of: 2 3 5 7 11 13 17 and 19

Wiki User

9y ago

Such numbers are called prime numbers. They are 2, 3, 5, 7, 11, 13, 17, and 19.

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Q: What numbers between 1 and 20 only have 2 factors?
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Related questions

### What numbers below 20 have 2 factors?

A number will always have 1 and itself as factors. And thus the only numbers with 2 factors will be prime numbers. The only prime numbers below 20 are 2, 3, 5, 7, 11, 13, 17 and 19, and thus these are the only numbers below 20 that have 2 factors.

### What composite numbers between 20 and30?

All of them except 23 and 29 which are prime numbers having only two factors

### Why is 23 and 29 the prime numbers between 20 and 30?

They are the only ones with just two factors.

48

### What is the factors for 20 35 45?

1 and 5 are the only numbers that are factors of 20, 35, and 45.

### What numbers between 1and 20 only have 2 factors?

The prime numbers: 2, 3, 5, 7, 11, 13, 17 and 19.

### What are the prime factors between 20 and 30?

Prime numbers between the given numbers are 23 and 29

### What are the composite numbers between 20 and 80?

They are the numbers that have more than two factors in them.

### What do the numbers 63 20 and 30 all have in common?

They are all positive two-digit whole numbers between 15 and 65. As to factors, only 1.

### What number between 0 and 20 has 2 factors?

For a number to have [only] 2 factors, it must be a prime number; the prime numbers between 0 and 20 are; 2, 3, 5, 7, 11, 13, 17, 19

### What numbers between 1 and 20 are factors of 20?

1, 2, 4, 5, 10, 20

### Numbers between 20 and 50 that have only two factors?

They are prime numbers which are: 23 29 31 37 41 43 and 47