n=int(input())
# a,b,c=map(int,input().split())
cnt=0
def gcd(a,b):
    if a==0: return b
    else: return gcd(b%a,a)
# print(gcd(a,b))

def gcd_3(a,b,c):
    if gcd(a,b)==0: return c
    else: return gcd(c % gcd(a,b),gcd(a,b))

for i in range(1,n+1):
    for j in range ( 1 , n + 1 ):
        for k in range ( 1 , n + 1 ):
            # cnt+=gcd_3(i,j,k)
            cnt+=1


print(cnt)