2 × 17 × 19 × 991

Prime Factor Structure

Factorization String 2 × 17 × 19 × 991

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 16

Divisor Sum (σ) 1,071,360

Proper Divisor Sum 431,174

Digit Sum / Digital Root 25 (Root: 7)

Adjacent Primes #640163 ← → #640193

1 2 17 19 34 38 323 646 991 1,982 16,847 18,829 33,694 37,658 320,093 640,186

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

640,186 320,093 960,280 480,140 240,070 120,035 360,106 180,053 540,160 270,080 135,040 67,520 33,760 16,880 8,440 4,220 2,110 1,055 3,166 1,583 4,750 2,375 7,126 3,563 10,690 5,345 16,036 8,018 4,009 12,028 6,014 3,007 9,022 4,511 13,534 6,767 20,302 10,151 30,454 15,227 45,682 22,841 68,524 34,262 17,131 51,394 25,697 77,092 38,546 19,273 57,820 28,910 14,455 43,366 21,683 65,050 32,525 97,576 48,788 24,394

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