3 × 67 × 21991

Prime Factor Structure

Factorization String 3 × 67 × 21991

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 8

Divisor Sum (σ) 5,981,824

Proper Divisor Sum 1,561,633

Digit Sum / Digital Root 21 (Root: 3)

Adjacent Primes #4420189 ← → #4420219

1 3 67 201 21,991 65,973 1,473,397 4,420,191

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

4,420,191 13,260,574 6,630,287 19,890,862 9,945,431 29,836,294 14,918,147 44,754,442 22,377,221 67,131,664 33,565,832 16,782,916 8,391,458 4,195,729 12,587,188 6,293,594 3,146,797 9,440,392 4,720,196 2,360,098 1,180,049 3,540,148 1,770,074 885,037 2,655,112 1,327,556 663,778 331,889 995,668 497,834 248,917 746,752 373,376 186,688 93,344 46,672 23,336 11,668 5,834 2,917 8,752 4,376 2,188 1,094 547 1,642 821 2,464 1,232 616 308 154 77 232 116 58 29 88 44 22

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