`Ư(5) = {±1; ±5}`
`Ư(6) = {±1; ±2; ±3; ±6}`
`Ư(12) = {±1; ±2; ±3; ±4; ±6; ±12}`
`Ư(-13) = {±1; ±13}`
`Ư(1) = {±1}`
`Ư(-8) = {±1; ±2; ±4; ±8}`
`B(-3) = {0; ±3; ±6; ±9; ±12;...}`
`B(5) = {0; ±5; ±10; ±15; ±20;...}`
`B(-7) = {0; ±7; ±14; ±21; ±28;...}`
`B(9) = {0; ±9; ±18; ±27; ±36;...}`