The correct option is
C 1
Concept: Factors are those natursl numbers which divide a given number evenly without leaving any remainder.
Sum of the digits of
273 is
2+7+3=12
∴ It is divisible by
3.
Also,
91 is divisible by
13.
⇒9113=7
∴ The factors of
273 are
1,3,7,13,3×7,3×13,7×13 and
273, i.e.,
1,3,7,21,39,91 and
273.