3³ × 5² × 31

Prime Factor Structure

Factorization String 3^3 × 5^2 × 31

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 24

Divisor Sum (σ) 39,680

Proper Divisor Sum 18,755

Digit Sum / Digital Root 18 (Root: 9)

Adjacent Primes #20921 ← → #20929

1 3 5 9 15 25 27 31 45 75 93 135 155 225 279 465 675 775 837 1,395 2,325 4,185 6,975 20,925

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

20,925 62,776 31,388 15,694 7,847 23,542 11,771 35,314 17,657 52,972 26,486 13,243 39,730 19,865 59,596 29,798 14,899 44,698 22,349 67,048 33,524 16,762 8,381 25,144 12,572 6,286 3,143 9,430 4,715 14,146 7,073 21,220 10,610 5,305 15,916 7,958 3,979 11,938 5,969 17,908 8,954 4,477 13,432 6,716 3,358 1,679 5,038 2,519 7,558 3,779 11,338 5,669 17,008 8,504 4,252 2,126 1,063 3,190 1,595 4,786

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