3 × 7 × 13 × 2521

Prime Factor Structure

Factorization String 3 × 7 × 13 × 2521

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 16

Divisor Sum (σ) 1,129,856

Proper Divisor Sum 441,623

Digit Sum / Digital Root 30 (Root: 3)

Adjacent Primes #688223 ← → #688249

1 3 7 13 21 39 91 273 2,521 7,563 17,647 32,773 52,941 98,319 229,411 688,233

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

688,233 2,064,700 1,032,350 516,175 1,548,526 774,263 2,322,790 1,161,395 3,484,186 1,742,093 5,226,280 2,613,140 1,306,570 653,285 1,959,856 979,928 489,964 244,982 122,491 367,474 183,737 551,212 275,606 137,803 413,410 206,705 620,116 310,058 155,029 465,088 232,544 116,272 58,136 29,068 14,534 7,267 21,802 10,901 32,704 16,352 8,176 4,088 2,044 1,022 511 1,534 767 2,302 1,151 3,454 1,727 5,182 2,591 7,774 3,887 11,662 5,831 17,494 8,747 26,242

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