a positive number that is equal to the sum of all positive integers that are submultiples of it, as 6, which is equal to the sum of 1, 2, and 3.
an integer, such as 28, that is equal to the sum of all its possible factors, excluding itself
A positive integer that equals the sum of all of its divisors other than itself. An example is 28, whose divisors (not counting itself) are 1, 2, 4, 7, and 14, which added together give 28.
[per-fek-toh] /pərˈfɛk toʊ/ noun, plural perfectos. 1. a rather thick, medium-sized cigar tapering almost down to a point at each end. /pəˈfɛktəʊ/ noun (pl) -tos 1. a large cigar that is tapered from both ends
/ˈpɜːfɪktə/ noun 1. a person who completes or makes something perfect 2. (printing) a machine or press capable of printing both sides of the paper in a single operation
[per-fek-ter] /pərˈfɛk tər/ noun, Printing. 1. a flatbed press for printing both sides of a sheet in one operation.
noun 1. . noun 1. another name for past participle