2² × 13 × 397

Prime Factor Structure

Factorization String 2^2 × 13 × 397

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 12

Divisor Sum (σ) 39,004

Proper Divisor Sum 18,360

Digit Sum / Digital Root 16 (Root: 7)

Adjacent Primes #20641 ← → #20663

1 2 4 13 26 52 397 794 1,588 5,161 10,322 20,644

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

20,644 10,322 5,161 15,484 7,742 3,871 11,614 5,807 17,422 8,711 26,134 13,067 39,202 19,601 58,804 29,402 14,701 44,104 22,052 11,026 5,513 16,540 8,270 4,135 12,406 6,203 18,610 9,305 27,916 13,958 6,979 20,938 10,469 31,408 15,704 7,852 3,926 1,963 5,890 2,945 8,836 4,418 2,209 6,628 3,314 1,657 4,972 2,486 1,243 3,730 1,865 5,596 2,798 1,399 4,198 2,099 6,298 3,149 9,448 4,724

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