Correct Answer - Option 1 : 20
Given:
Factor of = 240
Formula used:
N = (a + 1) (b + 1) (c +1) where X, Y and Z are the prime numbers and a, b and c are their respective powers
Calculations:
⇒ 240 = 24 × 31 × 51
⇒ Number of factors = (4 + 1) (1 + 1) (1 + )
⇒ Number of factors = 5 × 2 × 2
⇒ Number of factors = 20
∴ Number of factors is 20.