2 × 7 × 11 × 139

Prime Factor Structure

Factorization String 2 × 7 × 11 × 139

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 16

Divisor Sum (σ) 40,320

Proper Divisor Sum 18,914

Digit Sum / Digital Root 13 (Root: 4)

Adjacent Primes #21401 ← → #21407

1 2 7 11 14 22 77 139 154 278 973 1,529 1,946 3,058 10,703 21,406

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

21,406 10,703 32,110 16,055 48,166 24,083 72,250 36,125 108,376 54,188 27,094 13,547 40,642 20,321 60,964 30,482 15,241 45,724 22,862 11,431 34,294 17,147 51,442 25,721 77,164 38,582 19,291 57,874 28,937 86,812 43,406 21,703 65,110 32,555 97,666 48,833 146,500 73,250 36,625 109,876 54,938 27,469 82,408 41,204 20,602 10,301 30,904 15,452 7,726 3,863 11,590 5,795 17,386 8,693 26,080 13,040 6,520 3,260 1,630 815

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