1, 2, 4, 5
Four
Four of them.
16
Four: 1 5 25 125.
Its factors are: 1, 2, 4 and 8 which makes four of them
27720
The list of whole numbers that are divisible by XXX is infinite. The first four are: 100, 200, 300, 400 . . .
210 is the number whose prime factors are the first four primes unrepeated.
The term whole number does not have a consistent definition...If in referencing "whole numbers" you are referring to "nonnegative integers" then the first whole numbers are 0, 1, 2, 3.If in referencing "whole numbers" you are referring to "positive integers" then the first whole numbers are 1, 2, 3, 4.If in referencing "whole numbers" you are referring to "all integers" then there are no "first" whole numbers, since they would include (..., -3, -2, -1, 0, 1, 2, 3, ...) and extend to infinity in both directions.
A whole number has an odd number of unique factors if and only if it is a perfect square. The perfect squares less than 10 are 0, 1, 4, and 9. Therefore, there are four whole numbers less than 10 that have an odd number of unique factors.
6, 8 and 10 are some numbers with four factors.
There are four odd numbers less that 100 that have 6 factor. This does not compare with even numbers that have 12 factors!