In Jainism, the Navkar Mantra (Namokar Mantra) is a fundamental prayer that pays respect to five supreme beings: Arihant, Siddha, Acharya, Upadhyay, and Sadhu. Each of these is not a "dev" (deity) in the sense of gods who grant boons, but are revered spiritual beings at various stages of liberation and enlightenment.

Regarding the specific question of "how many devs reside on Navkar Mantra pad," if you are asking about how many divine beings or categories are venerated in the mantra, the answer is:

Five:

1. Arihantas (perfected souls with bodies),
2. Siddhas (liberated souls),
3. Acharyas (spiritual leaders),
4. Upadhyayas (spiritual teachers), and
5. Sadhus (monks and nuns).

These five are called the "Panch Parameshti." They are not devs in the sense of heavenly gods, but are regarded as the highest beings worthy of veneration according to Jain philosophy. The Navkar Mantra does not mention or venerate heavenly gods (devas), but rather these five supreme categories of souls.

If your question refers to something else, please clarify.