Nine has three factors.
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The factors of 81 are 1, 3, 9, 27, and 81
Nine has three factors: 1, 3 and 9
81 has these five factors: 1 3 9 27 81.
The first five perfect squares are: 1, 4, 9, 16, 25
The first 5 multiples of 9 are: 9, 18, 27, 36, and 45.