Question

Question 1 (c)

Write all the factors of the given number:
21

Answer 1

21 can be written as, $21=1\times 21=3\times 7=7\times 3$

The exact divisors of 21 are 1, 3, 7 and 21.

Factors are the exact divisors of a number.

$\therefore$ Factors of 21 = 1, 3, 7, 21.