Question

The sum of all positive even integral divisors of 1800 is

• A. 15x13x30
• B. 14x13x31
• C. 14x12x31
• D. 14x12x31

Answer 1

Answer: (B)

14x13x31

Answer 2

1800 = 2³ x 3² x 5²

∴ Sum of all even divisors

= (2¹ + 2² + 2³) (3⁰ + 3¹ + 3²) (5⁰ + 5¹ + 5²)

= 14 x 13 x 31