13 × 19891

Prime Factor Structure

Factorization String 13 × 19891

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 4

Divisor Sum (σ) 278,488

Proper Divisor Sum 19,905

Digit Sum / Digital Root 31 (Root: 4)

Adjacent Primes #258581 ← → #258607

1 13 19,891 258,583

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

258,583 775,750 387,875 1,163,626 581,813 1,745,440 872,720 436,360 218,180 109,090 54,545 163,636 81,818 40,909 122,728 61,364 30,682 15,341 46,024 23,012 11,506 5,753 17,260 8,630 4,315 12,946 6,473 19,420 9,710 4,855 14,566 7,283 21,850 10,925 32,776 16,388 8,194 4,097 12,292 6,146 3,073 9,220 4,610 2,305 6,916 3,458 1,729 5,188 2,594 1,297 3,892 1,946 973 2,920 1,460 730 365 1,096 548 274

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