Question

Tìm các ước số của mỗi số tự nhiên sau: 1, 4, 12, 30, 60

Answer 1

`Ư(1) = +-1`

` Ư(4) = +-1, +-2, +-4`

`Ư(12) = +-1, +-2, +-3, +-4, +-6, +-12`

`Ư(30) = +-1, +-2, +-3, +-5, +-6, +-10, +-15, +-30`

`Ư(60) = +-1, +-2, +-3, +-4, +-5, +-6, +-10, +-12, +-15, +-30, +-60`

Answer 2

\(\text{Ư}\left(1\right)=\left\{1\right\}\) 

\(\text{Ư}\left(4\right)=\left\{1;2;4\right\}\)

\(\text{Ư}\left(12\right)=\left\{1;2;3;4;6;12\right\}\)

\(\text{Ư}\left(30\right)=\left\{1;2;3;5;6;10;30\right\}\)

\(\text{Ư}\left(60\right)=\left\{1;2;3;4;5;6;10;12;15;20;30;60\right\}\).