k=int(input())
import fractions
x=0
c=0
d=0
for i in range(1,k+1):
  for j in range(i,k+1):
    for k in range(j,k+1):
      d=fractions.gcd(i,j)
      c=fractions.gcd(d,k)
      if i!=j and j!=k:
        x+=6*c
      elif i==j==k:
        x+=c
      else:
        x+=3*c
print(x)