3 × 7 × 19 × 997

Prime Factor Structure

Factorization String 3 × 7 × 19 × 997

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 16

Divisor Sum (σ) 638,720

Proper Divisor Sum 240,917

Digit Sum / Digital Root 30 (Root: 3)

Adjacent Primes #397799 ← → #397807

1 3 7 19 21 57 133 399 997 2,991 6,979 18,943 20,937 56,829 132,601 397,803

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

397,803 1,193,410 596,705 1,790,116 895,058 447,529 1,342,588 671,294 335,647 1,006,942 503,471 1,510,414 755,207 2,265,622 1,132,811 3,398,434 1,699,217 5,097,652 2,548,826 1,274,413 3,823,240 1,911,620 955,810 477,905 1,433,716 716,858 358,429 1,075,288 537,644 268,822 134,411 403,234 201,617 604,852 302,426 151,213 453,640 226,820 113,410 56,705 170,116 85,058 42,529 127,588 63,794 31,897 95,692 47,846 23,923 71,770 35,885 107,656 53,828 26,914 13,457 40,372 20,186 10,093 30,280 15,140

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