3 × 13 × 43 × 12757

Prime Factor Structure

Factorization String 3 × 13 × 43 × 12757

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 16

Divisor Sum (σ) 31,435,712

Proper Divisor Sum 10,042,223

Digit Sum / Digital Root 39 (Root: 3)

Adjacent Primes #21393481 ← → #21393521

1 3 13 39 43 129 559 1,677 12,757 38,271 165,841 497,523 548,551 1,645,653 7,131,163 21,393,489

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

21,393,489 64,180,468 32,090,234 16,045,117 48,135,352 24,067,676 12,033,838 6,016,919 18,050,758 9,025,379 27,076,138 13,538,069 40,614,208 20,307,104 10,153,552 5,076,776 2,538,388 1,269,194 634,597 1,903,792 951,896 475,948 237,974 118,987 356,962 178,481 535,444 267,722 133,861 401,584 200,792 100,396 50,198 25,099 75,298 37,649 112,948 56,474 28,237 84,712 42,356 21,178 10,589 31,768 15,884 7,942 3,971 11,914 5,957 17,872 8,936 4,468 2,234 1,117 3,352 1,676 838 419 1,258 629

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