N=int(input())
ANS=[]

for x in range(N+1):
    for y in range(N+1):
        if x*y>N:
            break

        if x+y!=0 and (N-x*y)%(x+y)==0:
            ANS.append((x,y,(N-x*y)//(x+y)))

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