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General
Easy

Question

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

  1. 5400  
  2. 10800  
  3. 16800  
  4. 14400  

The correct answer is: 16800


    5400 = 23 × 33 × 52
    sum = (2 + 22 + 23) (30 + 31 + 32 + 33) (5 + 52)= 16800

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