3² × 7² × 47

Prime Factor Structure

Factorization String 3^2 × 7^2 × 47

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 18

Divisor Sum (σ) 35,568

Proper Divisor Sum 14,841

Digit Sum / Digital Root 18 (Root: 9)

Adjacent Primes #20719 ← → #20731

1 3 7 9 21 47 49 63 141 147 329 423 441 987 2,303 2,961 6,909 20,727

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

20,727 62,182 31,091 93,274 46,637 139,912 69,956 34,978 17,489 52,468 26,234 13,117 39,352 19,676 9,838 4,919 14,758 7,379 22,138 11,069 33,208 16,604 8,302 4,151 12,454 6,227 18,682 9,341 28,024 14,012 7,006 3,503 10,510 5,255 15,766 7,883 23,650 11,825 35,476 17,738 8,869 26,608 13,304 6,652 3,326 1,663 4,990 2,495 7,486 3,743 11,230 5,615 16,846 8,423 25,270 12,635 37,906 18,953 56,860 28,430

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