1, 2, 4, 5, 8
One through nine all have single digit factors.
The factors of 4 are: 1, 2, and 4.The only prime factor of 4 is: 2.The factors of 40 are: 1, 2, 4, 5, 8, 10, 20, and 40.The prime factors of 40 are: 2 and 5.
9 has three factors: 1, 3, and 9
Both 10 and 20 are two-digit numbers that are factors of 20.
40 has 8 factors: 1 2 4 5 8 10 20 40.
no
One through nine all have single digit factors.
All numbers have factors. Some factors have one digit. The factors of 24 are 1, 2, 3, 4, 6, 8, 12, 24 The single digit factors of 24 are 1, 2, 3, 4, 6 and 8.
The single digit divisors (factors) of 160 are, 1, 2, 4, 5, and 8. As 1x 160 = 160, 2 x 80 = 160, 4 x 40 = 160, 5 x 32 = 160 and 8 x 20 = 160
30
1, 2, 3, 4, 6, 7
1, 2, 3, 4, 6, 8
Sure. Any 1-digit number contains only one-digit numbers as factors. Any larger number, on the other hand, contains itself as a factor, so these can be excluded.
1, 2, 3, 4, 6, 8, 9.
1
1 is a single digit, 0 is the absence of a digit.
1,2,23 and 46 are the only even factors of 46 so this is impossible