110 Dunne's are in the Republic of Ireland. 23 are in Northern Ireland. Source: http://www.dunnesstores.ie/page.php?pid=33
There is 22 is the republic of ireland and 16 in the north so 38 all together :) I think ...
They have many branches in Ireland, too many to list here. You will find details on their website. See the link below.
142
I just used the Tesco.ie website and using the 'Store Locator' tool expended the search to a maximum and it gave the answer as 104.
If you look in the store locator and count them all the answer is 20.