3 × 7 × 20857

Prime Factor Structure

Factorization String 3 × 7 × 20857

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 8

Divisor Sum (σ) 667,456

Proper Divisor Sum 229,459

Digit Sum / Digital Root 39 (Root: 3)

Adjacent Primes #437977 ← → #438001

1 3 7 21 20,857 62,571 145,999 437,997

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

437,997 1,313,992 656,996 328,498 164,249 492,748 246,374 123,187 369,562 184,781 554,344 277,172 138,586 69,293 207,880 103,940 51,970 25,985 77,956 38,978 19,489 58,468 29,234 14,617 43,852 21,926 10,963 32,890 16,445 49,336 24,668 12,334 6,167 18,502 9,251 27,754 13,877 41,632 20,816 10,408 5,204 2,602 1,301 3,904 1,952 976 488 244 122 61 184 92 46 23 70 35 106 53 160 80

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