res primos minores quam 26, excluso i3, uti sequens cal' 

 culus ostendic : 



Numeri primi, qui hic signum -}- recipinnt, simt 1, 

 3, 5, 7» 17» rcliqiiis vcro 11, 19, 23, signum — est 

 pracfigendiim ; composkis auttm nnmeris dentiir signa ex 

 ratione miiltiplicationis orla, unde formula pro divisoribus 

 sequcnti modo foimabitur : 



104N-I- i,-h 3,-4- î, -t- 7,-4- 9, — ii,-+- iï,-4- '7. — 19, -♦-î». — îj,-|-25 

 -^5'i -(- 4</) -t- 4Tj -H -15) -T-43i — 4»> "i" J7) "+- J5» — 33» -t- 3'» — 29. -h 37. 



