3 × 7² × 139

Prime Factor Structure

Factorization String 3 × 7^2 × 139

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 12

Divisor Sum (σ) 31,920

Proper Divisor Sum 11,487

Digit Sum / Digital Root 12 (Root: 3)

Adjacent Primes #20431 ← → #20441

1 3 7 21 49 139 147 417 973 2,919 6,811 20,433

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

20,433 61,300 30,650 15,325 45,976 22,988 11,494 5,747 17,242 8,621 25,864 12,932 6,466 3,233 9,700 4,850 2,425 7,276 3,638 1,819 5,458 2,729 8,188 4,094 2,047 6,142 3,071 9,214 4,607 13,822 6,911 20,734 10,367 31,102 15,551 46,654 23,327 69,982 34,991 104,974 52,487 157,462 78,731 236,194 118,097 354,292 177,146 88,573 265,720 132,860 66,430 33,215 99,646 49,823 149,470 74,735 224,206 112,103 336,310 168,155

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