3² × 23² × 4493

Prime Factor Structure

Factorization String 3^2 × 23^2 × 4493

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 18

Divisor Sum (σ) 32,307,366

Proper Divisor Sum 10,916,193

Digit Sum / Digital Root 27 (Root: 9)

Adjacent Primes #21391133 ← → #21391187

1 3 9 23 69 207 529 1,587 4,493 4,761 13,479 40,437 103,339 310,017 930,051 2,376,797 7,130,391 21,391,173

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

21,391,173 64,173,520 32,086,760 16,043,380 8,021,690 4,010,845 12,032,536 6,016,268 3,008,134 1,504,067 4,512,202 2,256,101 6,768,304 3,384,152 1,692,076 846,038 423,019 1,269,058 634,529 1,903,588 951,794 475,897 1,427,692 713,846 356,923 1,070,770 535,385 1,606,156 803,078 401,539 1,204,618 602,309 1,806,928 903,464 451,732 225,866 112,933 338,800 169,400 84,700 42,350 21,175 63,526 31,763 95,290 47,645 142,936 71,468 35,734 17,867 53,602 26,801 80,404 40,202 20,101 60,304 30,152 15,076 7,538 3,769

Other feeder batches with open delivery windows. Each feeder keeps its own target batch.