13 × 16921

Prime Factor Structure

Factorization String 13 × 16921

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 4

Divisor Sum (σ) 236,908

Proper Divisor Sum 16,935

Digit Sum / Digital Root 31 (Root: 4)

Adjacent Primes #219971 ← → #219977

1 13 16,921 219,973

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

219,973 659,920 329,960 164,980 82,490 41,245 123,736 61,868 30,934 15,467 46,402 23,201 69,604 34,802 17,401 52,204 26,102 13,051 39,154 19,577 58,732 29,366 14,683 44,050 22,025 66,076 33,038 16,519 49,558 24,779 74,338 37,169 111,508 55,754 27,877 83,632 41,816 20,908 10,454 5,227 15,682 7,841 23,524 11,762 5,881 17,644 8,822 4,411 13,234 6,617 19,852 9,926 4,963 14,890 7,445 22,336 11,168 5,584 2,792 1,396

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