2,3,5,7,11,13,17 &19 - they're all the prime numbers !
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.
The prime numbers: 2, 3, 5, 7, 11, 13, 17 and 19.
They are all positive two-digit whole numbers between 15 and 65. As to factors, only 1.
The numbers 23 and 29 are the only prime numbers between 20 and 30
Prime numbers only have factors of 1 and themselves: 23, 29
All of them except 23 and 29 which are prime numbers having only two factors
They are the only ones with just two 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.
48
The prime numbers: 2, 3, 5, 7, 11, 13, 17 and 19.
1 and 5 are the only numbers that are factors of 20, 35, and 45.
Prime numbers between the given numbers are 23 and 29
They are the numbers that have more than two factors in them.
They are all positive two-digit whole numbers between 15 and 65. As to factors, only 1.
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
1, 2, 4, 5, 10, 20
There are no whole numbers between 20 and 21. Only fractions or decimals exist between these two numbers. Whole numbers between 20 and 25 are 21, 22, 23, and 24.