The factors of 9 are: 1, 3, 9 The factors of 36 are: 1, 2, 3, 4, 6, 9, 12, 18, 36 The factors of 81 are: 1, 3, 9, 27, 81
25, 49, 81 To satisfy your criterion, you need the square of an odd number.
Factors are just numbers 81 can be divided by. The whole number factors are 1, 3, 9, 27, and 81
The factors of 81 are 1, 3, 9, 27, 81. For them to be common, they need to be compared to another set of factors.
1, 3, 9, 27, 81 81 27,3 9,3,3 3,3,3,3
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.
Because it has more than two factors and it is also a square number in which 9 times 9 = 81
The factors of 9 are: 1, 3, 9 The factors of 36 are: 1, 2, 3, 4, 6, 9, 12, 18, 36 The factors of 81 are: 1, 3, 9, 27, 81
If that's 81 - 16k2, it factors neatly as the difference of squares into (9 - 4k)(9 + 4k)If that's 81 + 16k2, it factors to (4k -9i)(4k + 9i) where i is the square root of negative one.
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 :)
The factors of 18 are 1,2,3,6,9, and 18. The factors of 81 are 1,3,9,27, and 81.
39,39,1,1 (: If you mean multiplication, 1, 3, 9, 27, 81 are all factors of 81.
25 and 81
The factors of 81 are: 1 3 9 27 81
The factors of 81 are 1, 3, 9, 27, and 81.
81 is a perfect square
The factors of 81 are 1, 3, 9, 27, and 81.