19 × 21001

Prime Factor Structure

Factorization String 19 × 21001

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 4

Divisor Sum (σ) 420,040

Proper Divisor Sum 21,021

Digit Sum / Digital Root 31 (Root: 4)

Adjacent Primes #398989 ← → #399023

1 19 21,001 399,019

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

399,019 1,197,058 598,529 1,795,588 897,794 448,897 1,346,692 673,346 336,673 1,010,020 505,010 252,505 757,516 378,758 189,379 568,138 284,069 852,208 426,104 213,052 106,526 53,263 159,790 79,895 239,686 119,843 359,530 179,765 539,296 269,648 134,824 67,412 33,706 16,853 50,560 25,280 12,640 6,320 3,160 1,580 790 395 1,186 593 1,780 890 445 1,336 668 334 167 502 251 754 377 1,132 566 283 850 425

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