81=3*3*3*3
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∙ 13y ago81 is a composite number. Composite numbers are any number that has more than two factors(one and itself). Therefore, since 3,9, and 27 are factors of 81 that makes it a composite number.
81
71 is a prime number because it has only two factors whereas 81 is a composite number because it has more than two factors.
Because it has more than two factors and it is also a square number in which 9 times 9 = 81
81 is a composite number as it has factors other than 1 and itself (3, 27 and 9).
FIve: 1, 3, 9, 27, 81
It is a composite number, you can get 81 by mulitpling 1*81, 3*27, and 9*9.compositeNo the number 81 is not prime it can be divided by nine.composite
16 and 81 have 5 factors
It has more than two distinct factors; they are 1, 3, 9, 27, 81
81 has 5 factors: 1, 3, 9, 27, and 81.
No, it does not.
Factors are numbers you can multiply together to get another number. 81: 1, 3, 9, 27, 81
81 = 3x3x3x3 = 3481 = 1,3,9,27,81
No. It has 5.
A number will have an odd number of factors if and only if one of those factors is the square root of the number. This is because any factor of a number you can find must pair up with another factor of that number, and multiply to give the number. The only exception is when the factor would be paired with itself. In other words, be the square root. 81 is a square number, and so the factor 9 (square root of 81) will not pair with any other factor, meaning 81 will have an odd number of factors. 40 has an even number of factors, because it is not a square number, and so all its factors can pair up.
Five of them.
81 is not a prime number. Its positive integer factors are: 1, 3, 9, 27, 81.81 is a Composite Number.