1 [trivially], 2, 3, 4, 5, 6, and 7.
The single digit divisors of 420 are: 1,2,3,4,5,6, and 7
2, 3, 4, 5, 6, 7 and 8. Also, 1 (trivially).
2100
none
28 is such a number.
The single-digit divisors of 7,000 are 1, 2, 4, 5, 7, 8.
The single digit divisors of 420 are: 1,2,3,4,5,6, and 7
The single-digit divisors of 27,000 are: 1, 2, 3, 4, 5, 6, 8, 9.
12458
The single-digit divisors of 3,456 are: 1, 2, 3, 4, 6, 8 and 9.
1, 2, 3, 5, 6, 7 and 9
The single-digit factors of 2100 are 1, 2, 3, 4, 5, 6, 7, 8, and 9. However, among these, the actual factors of 2100 are 1, 2, 3, 4, 5, 6, and 7. The number 8 and 9 are not factors of 2100. Thus, the complete list of single-digit factors is 1, 2, 3, 4, 5, 6, and 7.
1, 2, 4, 5, 7, 8
1 2 3 5 6 7 9.
The single-digit divisors of 1,680 are: 1, 2, 3, 4, 5, 6, 7, 8. The two-digit divisors are: 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 35, 40, 42, 48, 56, 60, 70, 80, 84.
1 2 3 4 5 6 7 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