3 × 5 × 7 × 1721

Prime Factor Structure

Factorization String 3 × 5 × 7 × 1721

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 16

Divisor Sum (σ) 330,624

Proper Divisor Sum 149,919

Digit Sum / Digital Root 21 (Root: 3)

Adjacent Primes #180701 ← → #180731

1 3 5 7 15 21 35 105 1,721 5,163 8,605 12,047 25,815 36,141 60,235 180,705

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

180,705 542,116 271,058 135,529 406,588 203,294 101,647 304,942 152,471 457,414 228,707 686,122 343,061 1,029,184 514,592 257,296 128,648 64,324 32,162 16,081 48,244 24,122 12,061 36,184 18,092 9,046 4,523 13,570 6,785 20,356 10,178 5,089 15,268 7,634 3,817 11,452 5,726 2,863 8,590 4,295 12,886 6,443 19,330 9,665 28,996 14,498 7,249 21,748 10,874 5,437 16,312 8,156 4,078 2,039 6,118 3,059 9,178 4,589 13,768 6,884

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