Find the sum of divisors of 544 which are perfect squares?
a.32 b.64 c.42 d.21

• ans>21
  
  1+16+4=21
• 9 years agoHelpfull: Yes(0) No(0)
• 544 square root=16.49, so we have to check upto 16 squares
  1^2 =1 will divide 544
  2^2=4 will divide 544
  3^2=9 will not divide
  16 is a divisor
  25 is not .
  36 is not .
  49 is not.
  64 is not.
  81 is not.
  100 is not.
  121 is not.
  144 is not.
  169 is not.
  196 is not.
  225 is not.
  256 is not
  so finally 1+4+16=21, is the answer
• 9 years agoHelpfull: Yes(0) No(0)