2 × 3 × 5 × 21391

Prime Factor Structure

Factorization String 2 × 3 × 5 × 21391

Distinct Prime Factors 4

Square Status No

Abundance Measure Abundant

Analytical Properties

Total Divisors 16

Divisor Sum (σ) 1,540,224

Proper Divisor Sum 898,494

Digit Sum / Digital Root 21 (Root: 3)

Adjacent Primes #641713 ← → #641747

1 2 3 5 6 10 15 30 21,391 42,782 64,173 106,955 128,346 213,910 320,865 641,730

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

641,730 320,865 962,596 481,298 240,649 721,948 360,974 180,487 541,462 270,731 812,194 406,097 1,218,292 609,146 304,573 913,720 456,860 228,430 114,215 342,646 171,323 513,970 256,985 770,956 385,478 192,739 578,218 289,109 867,328 433,664 216,832 108,416 54,208 27,104 13,552 6,776 3,388 1,694 847 2,542 1,271 3,814 1,907 5,722 2,861 8,584 4,292 2,146 1,073 3,220 1,610 805 2,416 1,208 604 302 151 454 227 682

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