5² × 821

Prime Factor Structure

Factorization String 5^2 × 821

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 6

Divisor Sum (σ) 25,482

Proper Divisor Sum 4,957

Digit Sum / Digital Root 14 (Root: 5)

Adjacent Primes #20521 ← → #20533

1 5 25 821 4,105 20,525

Iterative sequence n → n/2 (if even) or 3n+1 (if odd):

20,525 61,576 30,788 15,394 7,697 23,092 11,546 5,773 17,320 8,660 4,330 2,165 6,496 3,248 1,624 812 406 203 610 305 916 458 229 688 344 172 86 43 130 65 196 98 49 148 74 37 112 56 28 14 7 22 11 34 17 52 26 13 40 20 10 5 16 8 4 2 1

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