13 × 47 × 157 × 223

Prime Factor Structure

Factorization String 13 × 47 × 157 × 223

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 16

Divisor Sum (σ) 23,783,424

Proper Divisor Sum 2,391,703

Digit Sum / Digital Root 26 (Root: 8)

Adjacent Primes #21391703 ← → #21391723

1 13 47 157 223 611 2,041 2,899 7,379 10,481 35,011 95,927 136,253 455,143 1,645,517 21,391,721

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

21,391,721 64,175,164 32,087,582 16,043,791 48,131,374 24,065,687 72,197,062 36,098,531 108,295,594 54,147,797 162,443,392 81,221,696 40,610,848 20,305,424 10,152,712 5,076,356 2,538,178 1,269,089 3,807,268 1,903,634 951,817 2,855,452 1,427,726 713,863 2,141,590 1,070,795 3,212,386 1,606,193 4,818,580 2,409,290 1,204,645 3,613,936 1,806,968 903,484 451,742 225,871 677,614 338,807 1,016,422 508,211 1,524,634 762,317 2,286,952 1,143,476 571,738 285,869 857,608 428,804 214,402 107,201 321,604 160,802 80,401 241,204 120,602 60,301 180,904 90,452 45,226 22,613

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