`(a) 24=`
`1,2,3, 4, 6, 8, 12, 24`
`(b) 15=`
`1, 3, 5, 15`
` (c) 21=`
` 1, 3, 7, 21`
` (d) 27=`
` 1,3, 9, 27`
`(e) 12=`
`1, 2, 3, 4, 6, 12`
`(f)20=`
` 1, 2, 4, 5, 10, 20 `
`(g) 18=`
`1, 2, 3, 6, 9, 18 `
` (h) 23=`
`1, 23 `
`(i) 36=`
`1, 2, 3, 4, 6, 9, 12, 18, 36 `