13 × 43 × 1289

Prime Factor Structure

Factorization String 13 × 43 × 1289

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 8

Divisor Sum (σ) 794,640

Proper Divisor Sum 74,089

Digit Sum / Digital Root 20 (Root: 2)

Adjacent Primes #720547 ← → #720569

1 13 43 559 1,289 16,757 55,427 720,551

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

720,551 2,161,654 1,080,827 3,242,482 1,621,241 4,863,724 2,431,862 1,215,931 3,647,794 1,823,897 5,471,692 2,735,846 1,367,923 4,103,770 2,051,885 6,155,656 3,077,828 1,538,914 769,457 2,308,372 1,154,186 577,093 1,731,280 865,640 432,820 216,410 108,205 324,616 162,308 81,154 40,577 121,732 60,866 30,433 91,300 45,650 22,825 68,476 34,238 17,119 51,358 25,679 77,038 38,519 115,558 57,779 173,338 86,669 260,008 130,004 65,002 32,501 97,504 48,752 24,376 12,188 6,094 3,047 9,142 4,571

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