perfect number
Self-summing divisor total
A perfect number is a positive integer that equals the sum of all its divisors except itself.
The smallest is 6, whose divisors 1, 2, and 3 add up to 6.
The next is 28 (1 + 2 + 4 + 7 + 14).
Perfect numbers are rare—only a few dozen are known—and have fascinated mathematicians since antiquity.
Father of geometry
- divisorNumber you split by
- sumAddition's result
- aliquotExact fractional part
- integerNumber lacking fractions
even · prime · theorem · proof · conjecture · algorithm · factorization · formula
Existing in great quantity
- deficientHaving too little
- aliquotExact fractional part
- classificationSystematic grouping by traits
- excessSurplus beyond need
Comparative relation of parts
- symmetryInvariance under transformation
- balanceSteadiness or amount owed
- completenessState of being whole
- unityWholeness through cohesion
wholeness · order · beauty · elegance · cosmic · ideal · aesthetic
Ancient Greek mathematician
- PlatoGreek philosopher, academy founder
- AristotleGreek founder of formal logic
- philosophyStudy of fundamental truths
- PlatonismPhilosophy emphasizing ideal Forms
mysticism · numerology · classical · ancient · Hellenistic · Alexandria · cosmology · metaphysics
Euclid
Father of geometry
integer · even · prime · theorem · proof · conjecture · algorithm · factorization · formula · infinite
abundant
Existing in great quantity
- deficientHaving too little
- aliquotExact fractional part
- classificationSystematic grouping by traits
excess · surplus · comparison · taxonomy
proportion
Comparative relation of parts
- symmetryInvariance under transformation
- balanceSteadiness or amount owed
- completenessState of being whole
unity · wholeness · order · beauty · elegance · cosmic · ideal · aesthetic
Pythagoras
Ancient Greek mathematician
- PlatoGreek philosopher, academy founder
- AristotleGreek founder of formal logic
- philosophyStudy of fundamental truths
Platonism · mysticism · numerology · classical · ancient · Hellenistic · Alexandria · cosmology · metaphysics · sacred
- numbersone, two, four, three, 0
- number theoryprime numbers, prime, composite, integer, divisor
- math termsnumbers, plus or minus, linear growth, square, operand
- number wordspair, duo, trio, quartet, quintet
- Sacred Numberssacred numbers, three, angel numbers, seven, one
- math constantspi, e, phi, golden ratio, tau
number, perfect, perfectly, imperfect, perfection, perfected, imperfection, perfecting, perfectionist