Question

Number of proper factors of 2400 is equal to

• A. 35
• B. 36
• C. 37
• D. 34

Answer 1

Answer: (D)

34

Answer 2

2400 = 2⁵ x 5² x 3

Number of proper factors =(5+1) (2+1) (1+1) – 1 – 1 = 34

(2 can be selected in (5+1) ways, etc).