It has three prime factors, but not factors in total.
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A factor is a number or algebraic expression by which another is exactly divisible. Whole factors are whole numbers that are factors. In the equation 3 x 4 = 12, 3 and 4 are factors of 12.
Prime squares have three factors. 4, 9, 25
30, 42, 66, 78, 102, 105, 114, 138 all have exactly three distinct prime factors.
The only number less than 100 with exactly nine factors is 36. 19 is not one of the factors.
Common factors are one and three.