3 × 5 × 17 × 821

Prime Factor Structure

Factorization String 3 × 5 × 17 × 821

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 16

Divisor Sum (σ) 355,104

Proper Divisor Sum 145,749

Digit Sum / Digital Root 24 (Root: 6)

Adjacent Primes #209353 ← → #209357

1 3 5 15 17 51 85 255 821 2,463 4,105 12,315 13,957 41,871 69,785 209,355

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

209,355 628,066 314,033 942,100 471,050 235,525 706,576 353,288 176,644 88,322 44,161 132,484 66,242 33,121 99,364 49,682 24,841 74,524 37,262 18,631 55,894 27,947 83,842 41,921 125,764 62,882 31,441 94,324 47,162 23,581 70,744 35,372 17,686 8,843 26,530 13,265 39,796 19,898 9,949 29,848 14,924 7,462 3,731 11,194 5,597 16,792 8,396 4,198 2,099 6,298 3,149 9,448 4,724 2,362 1,181 3,544 1,772 886 443 1,330

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