n=int(input())


ANS=[]
SUM=0
now=1
for i in range(1,10**6+5):
    while SUM<n:
        SUM+=now*now*now
        now+=1

    if SUM==n:
        ANS.append((i,now-1))
    SUM-=i*i*i

    
print(len(ANS))

for x,y in ANS:
    print(x,y)