The answer depends on what is meant by "fators".
1 2 3 5 6 9 10 15 18 30 45 90.
1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90.
NO
I
n
1,2,4,8,24
1,2,4,7,8,14,28
they are 1,2,4,7,14,28
2 & 13
26 = 64
1, 2, 3, 5, 6, 10, 15, 23, 30, 46, 69, 115, 138, 230, 345, 690.