Primitive semi-perfect number

In Mathematical, a primitive semi-perfect number (also called a number pseudoparfait primitive , irréducible semi-perfect number or number pseudoparfait irreducible ) is a natural Nombre which does not have a clean Diviseur semi-perfect.

The first primitive semi-perfect small numbers are 6, 20, 28, 88, 104, 272,304,350,… (A006036 continuation on the electronic Encyclopédie of the whole continuations).

It was shown that there exists an infinity of semi-perfect numbers odd, as well as an infinity of primitive semi-perfect numbers which are not numbers in harmonic division.

See too

• abundant Number
• defective Number
• Perfect number
• nearly perfect Number

External bond

• MathWorld : Primitive semi-perfect number

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