3 × 7 × 30491

Prime Factor Structure

Factorization String 3 × 7 × 30491

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 8

Divisor Sum (σ) 975,744

Proper Divisor Sum 335,433

Digit Sum / Digital Root 15 (Root: 6)

Adjacent Primes #640307 ← → #640333

1 3 7 21 30,491 91,473 213,437 640,311

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

640,311 1,920,934 960,467 2,881,402 1,440,701 4,322,104 2,161,052 1,080,526 540,263 1,620,790 810,395 2,431,186 1,215,593 3,646,780 1,823,390 911,695 2,735,086 1,367,543 4,102,630 2,051,315 6,153,946 3,076,973 9,230,920 4,615,460 2,307,730 1,153,865 3,461,596 1,730,798 865,399 2,596,198 1,298,099 3,894,298 1,947,149 5,841,448 2,920,724 1,460,362 730,181 2,190,544 1,095,272 547,636 273,818 136,909 410,728 205,364 102,682 51,341 154,024 77,012 38,506 19,253 57,760 28,880 14,440 7,220 3,610 1,805 5,416 2,708 1,354 677

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