2 × 5 × 13 × 1987

Prime Factor Structure

Factorization String 2 × 5 × 13 × 1987

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 16

Divisor Sum (σ) 500,976

Proper Divisor Sum 242,666

Digit Sum / Digital Root 19 (Root: 1)

Adjacent Primes #258299 ← → #258317

1 2 5 10 13 26 65 130 1,987 3,974 9,935 19,870 25,831 51,662 129,155 258,310

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

258,310 129,155 387,466 193,733 581,200 290,600 145,300 72,650 36,325 108,976 54,488 27,244 13,622 6,811 20,434 10,217 30,652 15,326 7,663 22,990 11,495 34,486 17,243 51,730 25,865 77,596 38,798 19,399 58,198 29,099 87,298 43,649 130,948 65,474 32,737 98,212 49,106 24,553 73,660 36,830 18,415 55,246 27,623 82,870 41,435 124,306 62,153 186,460 93,230 46,615 139,846 69,923 209,770 104,885 314,656 157,328 78,664 39,332 19,666 9,833

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