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
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The largest one digit number that has three factors is 9. Its factors are 1, 3, and 9.
what is the largest three-digit number that is divisible by 4, 5, and 6
The largest number with three digits is 999.
999 is the largest 3 digit number because each of the three digits is the largest possible value (9). Whole number simply means that there is no decimal part or fraction.
999 = 27 x 37