abundant,-deficient-and-perfect-number-classifications.go

package main

import "fmt"

import "math"

func main() {

var d,a,p,i=0,0,0,1

for i=1;i<=20000;i++{

if pfac_sum(i)<i{

  d++

}else if pfac_sum(i)==i{

p++

}else{
a++
}
}
fmt.Printf("there are %d  deficient numbers b/w 1 and 20000\n", d)
fmt.Printf("there are %d abundant numbers b/w 1 and 20000\n", a)
fmt.Printf("there are %d perfect numbers b/w 1 and 20000\n",p)
}
func pfac_sum(i int) int {
	var p,sum=1,0		
       for p=1;p<=i/2;p++{
	x := float64(i)	
         y := float64(p)
	  if math.Mod(x,y)==0{
	   sum= sum+p
  }	
}
	return sum
}