The factors of 81 are 1, 3, 9, 27, and 81
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81 has these five factors: 1 3 9 27 81.
1x81 or vice versa 3x27 or vice versa 9x9 Those are the factors that make up 81 - 1, 81, 3, 27, and 9 - (I'll let you be the judge on which are the first 4)
The factors of 81 are 1, 3, 9, 27, and 81 .
The positive integer factors of 81 are:1, 3, 9, 27, 81
The common factors of 36 and 81 are: 1, 3, and 9