3 × 19 × 47 × 239

Prime Factor Structure

Factorization String 3 × 19 × 47 × 239

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 16

Divisor Sum (σ) 921,600

Proper Divisor Sum 281,319

Digit Sum / Digital Root 21 (Root: 3)

Adjacent Primes #640279 ← → #640303

1 3 19 47 57 141 239 717 893 2,679 4,541 11,233 13,623 33,699 213,427 640,281

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

640,281 1,920,844 960,422 480,211 1,440,634 720,317 2,160,952 1,080,476 540,238 270,119 810,358 405,179 1,215,538 607,769 1,823,308 911,654 455,827 1,367,482 683,741 2,051,224 1,025,612 512,806 256,403 769,210 384,605 1,153,816 576,908 288,454 144,227 432,682 216,341 649,024 324,512 162,256 81,128 40,564 20,282 10,141 30,424 15,212 7,606 3,803 11,410 5,705 17,116 8,558 4,279 12,838 6,419 19,258 9,629 28,888 14,444 7,222 3,611 10,834 5,417 16,252 8,126 4,063

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