n=int(input())
cs=[0]
for i in range(1,10**6+2):
    cs.append(cs[-1]+i**3)
s2i={}
ans=[]
for i,s in enumerate(cs):
    if s-n in s2i:
        ans.append((s2i[s-n]+1,i))
    s2i[s]=i
print(len(ans))
for l,r in ans:print(l,r)