2 × 7 × 19 × 821

Prime Factor Structure

Factorization String 2 × 7 × 19 × 821

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 16

Divisor Sum (σ) 394,560

Proper Divisor Sum 176,174

Digit Sum / Digital Root 28 (Root: 1)

Adjacent Primes #218381 ← → #218389

1 2 7 14 19 38 133 266 821 1,642 5,747 11,494 15,599 31,198 109,193 218,386

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

218,386 109,193 327,580 163,790 81,895 245,686 122,843 368,530 184,265 552,796 276,398 138,199 414,598 207,299 621,898 310,949 932,848 466,424 233,212 116,606 58,303 174,910 87,455 262,366 131,183 393,550 196,775 590,326 295,163 885,490 442,745 1,328,236 664,118 332,059 996,178 498,089 1,494,268 747,134 373,567 1,120,702 560,351 1,681,054 840,527 2,521,582 1,260,791 3,782,374 1,891,187 5,673,562 2,836,781 8,510,344 4,255,172 2,127,586 1,063,793 3,191,380 1,595,690 797,845 2,393,536 1,196,768 598,384 299,192

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