The number 9: factors are 9, 3, and 1.
4, 9 and 25.
Four
35 x 285 = 9975 The highest three-digit number divisible by 35 is 9975.
If factors include 1 and the number itself then the any number (n) with only 4 factors has to be the product of two prime numbers, p1 and p2. The factors are then n, p1, p2, and 1. The largest 3-digit number with only 4 factors is 998. The factors are 998, 499, 2 and 1
Four.
9409.
14
Any composite number. Examples: 4 and 9 . . . (three factors) 6, 8, and 10 . . . (four factors) 12 . . . (six factors) 60 . . . (twelve factors)
6
4, 9 and 25.
9801.
95
231 has exactly three prime factors. They are 3, 7, and 11.
Four
Among positive integers, 6
3315 has four prime factors they are 3, 5, 13, and 17
Try 26 whose factors are: 1, 2, 13 and 26