2² × 5 × 31981

Prime Factor Structure

Factorization String 2^2 × 5 × 31981

Distinct Prime Factors 3

Square Status No

Abundance Measure Abundant

Analytical Properties

Total Divisors 12

Divisor Sum (σ) 1,343,244

Proper Divisor Sum 703,624

Digit Sum / Digital Root 26 (Root: 8)

Adjacent Primes #639601 ← → #639631

1 2 4 5 10 20 31,981 63,962 127,924 159,905 319,810 639,620

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

639,620 319,810 159,905 479,716 239,858 119,929 359,788 179,894 89,947 269,842 134,921 404,764 202,382 101,191 303,574 151,787 455,362 227,681 683,044 341,522 170,761 512,284 256,142 128,071 384,214 192,107 576,322 288,161 864,484 432,242 216,121 648,364 324,182 162,091 486,274 243,137 729,412 364,706 182,353 547,060 273,530 136,765 410,296 205,148 102,574 51,287 153,862 76,931 230,794 115,397 346,192 173,096 86,548 43,274 21,637 64,912 32,456 16,228 8,114 4,057

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