21871

Prime Factor Structure

Factorization String 21871

Distinct Prime Factors 1

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 2

Divisor Sum (σ) 21,872

Proper Divisor Sum 1

Digit Sum / Digital Root 19 (Root: 1)

Adjacent Primes #21863 ← → #21881

1 21,871

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

21,871 65,614 32,807 98,422 49,211 147,634 73,817 221,452 110,726 55,363 166,090 83,045 249,136 124,568 62,284 31,142 15,571 46,714 23,357 70,072 35,036 17,518 8,759 26,278 13,139 39,418 19,709 59,128 29,564 14,782 7,391 22,174 11,087 33,262 16,631 49,894 24,947 74,842 37,421 112,264 56,132 28,066 14,033 42,100 21,050 10,525 31,576 15,788 7,894 3,947 11,842 5,921 17,764 8,882 4,441 13,324 6,662 3,331 9,994 4,997

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