The first perfect number is NUMBER@1 , because NUMBER@2 , NUMBER@3 , and NUMBER@4 are its proper positive divisors , and NUMBER@2 + NUMBER@3 + NUMBER@4 = NUMBER@1 .

Its divisors -LRB- other than the number itself : NUMBER@1 -RRB- are NUMBER@2 , NUMBER@3 , and NUMBER@4 and NUMBER@2 + NUMBER@3 + NUMBER@4 equals NUMBER@1 .
