N = int(input())

ans = []


### x < y < z
for x in range(N):
    for y in range(x+1,N+1):
        if 2*x*y + y*y > N:
            break

        n = N - x*y
        if n%(x+y):
            continue
        z = n // (x+y)
        if z <= y:
            continue
        ans.append([x,y,z])
        ans.append([x,z,y])
        ans.append([y,x,z])
        ans.append([y,z,x])
        ans.append([z,x,y])
        ans.append([z,y,x])


### x = y ,z

for x in range(1,N):
    
    n = N - x**2

    if n < 0 or n%(x+x):
        continue

    z = n // (x+x)

    if z == x:
        ans.append([x,x,x])
    else:
        ans.append([x,x,z])
        ans.append([x,z,x])
        ans.append([z,x,x])


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