42
2,11111111...
8
1.090909091
39
13 13 divdied by 2 is 6 but 6x2=12 so its 6.1
0.0213
84 divided by 2 is 42
84
2 × 7 × 2 × 3 = 84
84 = 2 * 2 * 3 * 7
2/4 or 1/2 of 84 is 42
84/2 42/2 21/3 7 Seven is prime, so the prime factors of 84 are: 2*2*3*7 So all numbers that are not 1, 2, 3, 7 or 84 are not factors of 84.