13 × 1609

Prime Factor Structure

Factorization String 13 × 1609

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 4

Divisor Sum (σ) 22,540

Proper Divisor Sum 1,623

Digit Sum / Digital Root 19 (Root: 1)

Adjacent Primes #20903 ← → #20921

1 13 1,609 20,917

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

20,917 62,752 31,376 15,688 7,844 3,922 1,961 5,884 2,942 1,471 4,414 2,207 6,622 3,311 9,934 4,967 14,902 7,451 22,354 11,177 33,532 16,766 8,383 25,150 12,575 37,726 18,863 56,590 28,295 84,886 42,443 127,330 63,665 190,996 95,498 47,749 143,248 71,624 35,812 17,906 8,953 26,860 13,430 6,715 20,146 10,073 30,220 15,110 7,555 22,666 11,333 34,000 17,000 8,500 4,250 2,125 6,376 3,188 1,594 797

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