1 ,2,3,6,9, 18. 18,36,72.

1,2,3,5,6, 10, 15,30.30,60,93.

1,2,3,4,6,9, 12, 18,36.36,72, 108.

With short division, such as: 1 2 =1* 12 = 2 * 6 = 3 * 4, then1,2,3,4,6, 12 are all12. The following is similar.

Note: If it is junior high school, it also includes negative numbers.

Hope to adopt, thank you!