All numbers have factors. For example, the number 300 has the factors 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 25, 30, 50, 60, 75, 100, 150, 300. Some of those factors are greater than 100, some are less than 100.
All of the composite numbers less than 100 have factor pairs.
Numbers less than 100 having 19 as a factor are 19, 38, 57, 76, and 95.
48 is a possibility
When they have a factor in common greater than one.
84
80 has 5 factor pairs.
92
1 has 1 factor.
Any multiple of 10.
There are 80 such integers.
30, 60 or 90
When one factor is less than one, the product will be less than the other factor.