import math
n = int(input())

nums = []
for i in range(1, int(math.sqrt(n))+1):
    for j in range(1, n+1):
        print(i, j)
        if i*j == n:
            num = str(i) + str(j)
            if not num in nums:
                nums.append(num)
                break

if math.sqrt(n)%1 == 0:
    print(len(nums) * 2 - 1)
else:
    print(len(nums) * 2)