3 × 7 × 19²

Prime Factor Structure

Factorization String 3 × 7 × 19^2

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 12

Divisor Sum (σ) 12,192

Proper Divisor Sum 4,611

Digit Sum / Digital Root 21 (Root: 3)

Adjacent Primes #7577 ← → #7583

1 3 7 19 21 57 133 361 399 1,083 2,527 7,581

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

7,581 22,744 11,372 5,686 2,843 8,530 4,265 12,796 6,398 3,199 9,598 4,799 14,398 7,199 21,598 10,799 32,398 16,199 48,598 24,299 72,898 36,449 109,348 54,674 27,337 82,012 41,006 20,503 61,510 30,755 92,266 46,133 138,400 69,200 34,600 17,300 8,650 4,325 12,976 6,488 3,244 1,622 811 2,434 1,217 3,652 1,826 913 2,740 1,370 685 2,056 1,028 514 257 772 386 193 580 290

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