19 × 31 × 139

Prime Factor Structure

Factorization String 19 × 31 × 139

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 8

Divisor Sum (σ) 89,600

Proper Divisor Sum 7,729

Digit Sum / Digital Root 25 (Root: 7)

Adjacent Primes #81869 ← → #81883

1 19 31 139 589 2,641 4,309 81,871

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

81,871 245,614 122,807 368,422 184,211 552,634 276,317 828,952 414,476 207,238 103,619 310,858 155,429 466,288 233,144 116,572 58,286 29,143 87,430 43,715 131,146 65,573 196,720 98,360 49,180 24,590 12,295 36,886 18,443 55,330 27,665 82,996 41,498 20,749 62,248 31,124 15,562 7,781 23,344 11,672 5,836 2,918 1,459 4,378 2,189 6,568 3,284 1,642 821 2,464 1,232 616 308 154 77 232 116 58 29 88

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