Question

Sum of all divisors of 5400 whose unit digit is 0, is –

• A. 5400
• B. 10800
• C. 16800
• D. 14400

Answer 1

Answer: (C)

16800

Answer 2

5400 = 2³ × 3³ × 5²

Sum = (2 + 2² + 2³) (3⁰ + 3¹ + 3² + 3³) (5 + 5²)

= 16800