Um, proper factors ?
The plural of proper is propers. As in "the propers must be observed".
a proper factor is a factor.
The plural of the proper noun is Carolinas.
The plural of the proper name "Sirus" is "Siruses" or "Siri."
Plural nouns are not capitalized, unless they are proper nouns.
A proper noun is the name of a specific person, place, or thing. A proper plural noun is the plural form of a proper noun. Examples:There are a lot of John Waynes in this world, named after the actor John Wayne.There are 34 cities or towns in the world named Albany; 28 Albanys are in the US.How many should we order? Get six Whoppers and six Cokes.
The plural of the proper noun Mia is Mias.
"Ouchies" is not a proper word. "Ow" has no plural, it is an exclamation.
No. Prime numbers don't have proper factors.
It depends on the number being factored. 22 is a proper factor of 44. 22 is a factor, but not a proper factor, of 22.
It can be. 18 is a proper factor of 36.
It can be. 24 is a proper factor of 48.