Any product of 2 prime numbers will have 4 factors. Any Prime number to the 3rd power will have 4 factors.
6, 8, 10, 14, 15, 21, 22, 26, 27, 33, 34, 35, 38, 39, 46, 51, 55, 57, 58, 62, 65, 69, 74, 77, 82, 85, 86, 87, 91, 93, 94, 95
Oh, dude, let me break it down for you. Numbers with exactly 4 factors are a special breed. They're like the cool kids at the math party. So, we're looking at the squares of prime numbers because they only have 3 unique factors - 1, the prime number itself, and the square root of the prime number. In this case, we're talking about 4, 9, and 25. So, those are the numbers you're looking for under 100.
Numbers that have exactly 4 factors under 100 are square numbers of prime numbers. In other words, numbers that can be expressed as the square of a prime number. For example, 4 (2^2), 9 (3^2), 25 (5^2), and 49 (7^2) are all examples of numbers with exactly 4 factors under 100. These numbers have the factors 1, the prime number itself, the square root of the number, and the number itself.
60, 72, 84, 90 and 96
6 (1,2,3,6) 10 (1,2,5,10) and 15 (1,3,5,15).
24edit: nonethe smallest number with 12 distinct factors would be2*3*5*7*11*13*17*19*23*29*31*37>>100
There are exactly 50 even numbers if you include 100. There are exactly 50 odd numbers if you include 1.
4, 9, 25, and 49 are all of the numbers between 1 and 100 having 3 factors.
There are five numbers in that range with 12 factors, but none with exactly eleven.
16 and 81 are the only two.
By definition, a prime number has exactly two factors. So, there are no prime numbers with exactly three factors.
Each of the 25 prime numbers from 1 to 100 has exactly two factors, 1 and the number itself. The other 75 numbers from 1 to 100 are not prime numbers because none of them have exactly two factors.
4 (4,2,1) 9 (9,3,1) 25 (25,5,1) 49 (49,7,1) i think that is it...
There are a lot more than three! 6 (1,2,3,6) 10 (1,2,5,10) 15 (1,3,5,15)
No numbers between 1 and 100 have exactly eleven factors. 60, 72, 84, 90 and 96 each have twelve factors.
In that range, only 100 has exactly 9 factors.
4, 9, 25 and 49.
Numbers having exactly three factors are the squares of prime numbers. Examples of these numbers greater than 100 are 121, 169, 289, 361, 529, 841, etc.
it's probably 60 that has 12 factors
Just 36.