3 × 67 × 271 × 389

Prime Factor Structure

Factorization String 3 × 67 × 271 × 389

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 16

Divisor Sum (σ) 28,853,760

Proper Divisor Sum 7,664,541

Digit Sum / Digital Root 33 (Root: 6)

Adjacent Primes #21189173 ← → #21189221

1 3 67 201 271 389 813 1,167 18,157 26,063 54,471 78,189 105,419 316,257 7,063,073 21,189,219

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

21,189,219 63,567,658 31,783,829 95,351,488 47,675,744 23,837,872 11,918,936 5,959,468 2,979,734 1,489,867 4,469,602 2,234,801 6,704,404 3,352,202 1,676,101 5,028,304 2,514,152 1,257,076 628,538 314,269 942,808 471,404 235,702 117,851 353,554 176,777 530,332 265,166 132,583 397,750 198,875 596,626 298,313 894,940 447,470 223,735 671,206 335,603 1,006,810 503,405 1,510,216 755,108 377,554 188,777 566,332 283,166 141,583 424,750 212,375 637,126 318,563 955,690 477,845 1,433,536 716,768 358,384 179,192 89,596 44,798 22,399

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