2 × 13² × 647

Prime Factor Structure

Factorization String 2 × 13^2 × 647

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 12

Divisor Sum (σ) 355,752

Proper Divisor Sum 137,066

Digit Sum / Digital Root 31 (Root: 4)

Adjacent Primes #218681 ← → #218711

1 2 13 26 169 338 647 1,294 8,411 16,822 109,343 218,686

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

218,686 109,343 328,030 164,015 492,046 246,023 738,070 369,035 1,107,106 553,553 1,660,660 830,330 415,165 1,245,496 622,748 311,374 155,687 467,062 233,531 700,594 350,297 1,050,892 525,446 262,723 788,170 394,085 1,182,256 591,128 295,564 147,782 73,891 221,674 110,837 332,512 166,256 83,128 41,564 20,782 10,391 31,174 15,587 46,762 23,381 70,144 35,072 17,536 8,768 4,384 2,192 1,096 548 274 137 412 206 103 310 155 466 233

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