What is the total number of fundamental pillars (Arkan) of Islam?

Explanation

Islam is built upon 5 fundamental pillars (Arkan-e-Islam) as stated in the famous Hadith of Jibreel: 1) Shahada (Faith), 2) Salah (Prayer), 3) Zakat (Almsgiving), 4) Sawm (Fasting in Ramadan), and 5) Hajj (Pilgrimage to Mecca for those able). Note: Do not confuse the 5 Pillars of Islam with the 6 Articles of Faith (Iman-e-Mufassal).