Some examples of numbers with exactly four factors are 6, 15, and 21. For 6, the factors are 1, 2, 3, and 6, and for 15, the factors are 1, 3, 5, and 15. Similarly, for 21, the factors are 1, 3, 7, and 21.
Which is the smallest 2 digit number having exactly 4 factors?
25 is the smallest 2 digit number having exactly 4 factors
Which is the smallest number that has 4 prime factor less than 10?
So, required number will be (2) * (3) * (5) * (7) = 210. Hence, the smallest number having four different prime factors will be 210. smallest number having four different prime factors.
Which is the smallest number with all factors?
Since it contains each of these factors, in some manner, this multiple is common to each of these factors. If you’re talking about the smallest number having all of these factors, then you have to consider duplicates. For instance, 2 is a factor of 4, 6, and 12; and 3 is a factor of 6 and 12. So you’re looking for the least such number.
Which is natural numbers have exactly 5 factors?
Let’s assume you mean which natural numbers have exactly 5 factors including themselves and 1 then the answer is all primes raised to the fourth power, so 2 4, 3 4, 5 4, 7 4, ….etc. By the fundamental theorem of arithmetic every natural number n can be written as a unique product of primes:-
How to find the smallest number that is prime?
Since 17 17 is prime, that is, 17 =1×17 17 = 1 × 17, and we are meant to exclude 1 1 and 17 17, we must have that f(17) =0 f ( 17) = 0. Write down the smallest x x for which f(x)= 4 f ( x) = 4. The smallest x x for which f(x)= 4 f ( x) = 4 will be the product of the four smallest prime numbers. So x= 2×3×5×7= 210 x = 2 × 3 × 5 × 7 = 210.
What are numbers that have exactly 4 factors under 100?
No numbers between 1 and 100 have exactly eleven factors. 60, 72, 84, 90 and 96 each have twelve factors. What are the 3 numbers that are under 100 that have 4 factors exactly?
