Regarding countries that border the most other countries, the one that is #1 in Africa, as well as tied for #4 in the world, is the Democratic Republic of the Congo.
D. R. Congo borders the following nine countries (listed alphabetically):
Only one: Lesotho. Lesotho is entirely surrounded by South Africa and is one of the the only three countries to be entirely surrounded by another country. The other two are San Marino and Vatican City, entirely surrounded by Italy.
Iraq is a wholly Asian country. It is not anywhere in Africa.
Brazil shares borders with five other countries: Argentina, Bolivia, Paraguay, Peru, and Colombia.
Russia is the European country with the most countries bordering it. It shares land borders with 14 other countries.
The United States shares borders with Canada to the north and Mexico to the south.
Only one: Lesotho. Lesotho is entirely surrounded by South Africa and is one of the the only three countries to be entirely surrounded by another country. The other two are San Marino and Vatican City, entirely surrounded by Italy.
Swaziland shares borders with Mozambique and South Africa.
There are 54 recognized countries in Africa, and the only country that shares a border with just one other country is Lesotho, which is entirely surrounded by South Africa. Additionally, Eswatini (formerly Swaziland) shares borders with South Africa and Mozambique, but it does not meet the criteria of having only one bordering country. Thus, Lesotho is the only country in Africa that fits your description.
Iraq is a wholly Asian country. It is not anywhere in Africa.
No, South Africa is not an island. It is a country at the very bottom (south) of the African continent. It shares borders with Namibia, Botswana, Zimbabwe, Mozambique and Swaziland.
Samoa is an island country. This means that there are no countries that it shares any borders with.
The Dominican Republic shares borders with only one country. It shares the island of Hispaniola with Haiti.
There is no country that borders with all four of these countries ! # Italy share borders with Switzerland, Austria and Slovenia, but not with Spain. # France share borders with Switzerland and Spain, but not with Austria and Slovenia. # Germany shares borders with Switzerland and Austria, but not with Spain and Slovenia.
Brazil shares borders with five other countries: Argentina, Bolivia, Paraguay, Peru, and Colombia.
Zimbabwe is the country which shares borders with Zambia, Botswana, Mozambique and South Africa, all of which are located on the continent of Africa, in the southern region.
Russia is the European country with the most countries bordering it. It shares land borders with 14 other countries.
The United States shares borders with Canada to the north and Mexico to the south.