Amicables pairs and Perfect numbers
Definitions
An aliquot part a of a positive integer n > 1 is a proper divider of this integer,
i.e. a divider other than n.
Let s(n) the sum of the proper dividers of n.
A positive integer n > 1 is perfect if n is the sum of its proper dividers.
n is perfect if s(n) = n.
Two different positive integers m and n are amicables if each one of them is equal to the sum of the proper dividers of the other.
m and n are amicables if s(m) = n and s(n) = m.
A positive integer n > 1 is perfect if n is the sum of its proper dividers.
n is perfect if s(n) = n.
Two different positive integers m and n are amicables if each one of them is equal to the sum of the proper dividers of the other.
m and n are amicables if s(m) = n and s(n) = m.
Complements – Documents – Links
MathWorld : perfect number Eric W. Weisstein (MathWorld Wolfram Research).
MathWorld : amicable pair Eric W. Weisstein (MathWorld Wolfram Research).
A list of the first 5001 amicable pairs David Moews, Paul C. Moews (1996).
A000396 Nombres parfaits.
A000203 somme des diviseurs de n.
A003023 Longueurs des séquences aliquotes.
MathWorld : amicable pair Eric W. Weisstein (MathWorld Wolfram Research).
A list of the first 5001 amicable pairs David Moews, Paul C. Moews (1996).
A000396 Nombres parfaits.
A000203 somme des diviseurs de n.
A003023 Longueurs des séquences aliquotes.