Perfect Number Calculator
Check if a number is perfect, abundant, or deficient by computing the sum of its proper divisors.
Inputs
Results
Classification
Perfect
Sum of Proper Divisors
28
How to Use This Calculator
- Enter Number.
- Review Classification and Sum of Proper Divisors.
- Use Abundance and Proper Divisor Count to inform your decision.
- Use the chart to visualize the results and explore different scenarios by adjusting inputs.
What each input means
- Number
- Enter a positive integer to classify (1 to 10,000,000)
How this is calculated
Worked example, using the default values
- Identify Input ParametersNumber = 28 = 1 input(s) provided
- Calculate ClassificationPerfect = Perfect
- Calculate Sum of Proper Divisors28 = 28
- Calculate Abundance0 = 0
- Calculate Proper Divisor CountProper Divisor Count = divisors.length5 = 5
Engine last updated . Checked against 5 independently-derived tests — how we verify calculators.
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