No. 81=9*9=3*27=1*81
81 has 5 factors and is a square number.
36=6*6=3*12=1*36=2*18=4*9
36 has 9 factors and is a square number.
This doesn't mean that no square numbers have exactly 3 factors though, because:
9=3*3=1*9
9 has 3 factors and is a square number.
4=2*2=1*4
4 has 3 factors and is a square number.
All square numbers have an odd number of factors though (because they have a whole number which multiplies by itself to get the number).
Factors are whole numbers only, and not decimals.
Hope this helps :)
No. The square roots 8 are irrational, as are the square roots of most even numbers.
All of the numbers between 50 and 60 can be factors. If you're asking for the prime numbers, that's 53 and 59. If you're asking us to factor all the numbers between 50 and 60, then no.
find all the square numbers between 1500 and 1800
Yes. The square root of 81 is 9 - a natural number and all natural numbers are rational numbers.
4x4=16, and 5x5=25, so 4 and 5 are the whole numbers closest to the square root of 19. [And incidentally of all the square roots of all the whole numbers between 16 and 25.]
All numbers that are the square of primes have exactly 3 factors.
That is correct -- all prime numbers have exactly two factors.
All numbers that have exactly two factors are prime numbers whereas composite numbers have more than two factors.
The factors of all numbers can be written in pairs. With square numbers, one of those pairs is the same number twice. When listed singly, square numbers have an odd number of factors. All others are even.
All square numbers have an odd number of factors.
By definition, a prime number has exactly two factors. So, there are no prime numbers with exactly three factors.
The squares of all prime numbers above 2 have exactly 3 factors.
No. Perfect square numbers have an odd number of factors.
Yes.
Every square number (except 1) is composite. Prime numbers only have two factors, one and the numbers themselves. Since square numbers also have at least the square roots as factors, they have to be composite.
Yes.
All numbers have factors. Some factors are perfect squares. We call these perfect square factors. 9 is a perfect square factor of 27.