97 has two factors.
The number one has one factor. Prime numbers have two.
63? But it has more than two one-digit factors.
63
24
36
It is 1 which has only one factor followd by any of the prime numbers which have only two factors
63.
The two-digit factors of 100 and 1000 are all composite.
101 is the first three-digit prime number.
24
Both 10 and 20 are two-digit numbers that are factors of 20.