31 × 20809

Prime Factor Structure

Factorization String 31 × 20809

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 4

Divisor Sum (σ) 665,920

Proper Divisor Sum 20,841

Digit Sum / Digital Root 31 (Root: 4)

Adjacent Primes #645077 ← → #645083

1 31 20,809 645,079

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

645,079 1,935,238 967,619 2,902,858 1,451,429 4,354,288 2,177,144 1,088,572 544,286 272,143 816,430 408,215 1,224,646 612,323 1,836,970 918,485 2,755,456 1,377,728 688,864 344,432 172,216 86,108 43,054 21,527 64,582 32,291 96,874 48,437 145,312 72,656 36,328 18,164 9,082 4,541 13,624 6,812 3,406 1,703 5,110 2,555 7,666 3,833 11,500 5,750 2,875 8,626 4,313 12,940 6,470 3,235 9,706 4,853 14,560 7,280 3,640 1,820 910 455 1,366 683

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