2 × 3² × 17 × 71

Prime Factor Structure

Factorization String 2 × 3^2 × 17 × 71

Distinct Prime Factors 4

Square Status No

Abundance Measure Abundant

Analytical Properties

Total Divisors 24

Divisor Sum (σ) 50,544

Proper Divisor Sum 28,818

Digit Sum / Digital Root 18 (Root: 9)

Adjacent Primes #21713 ← → #21727

1 2 3 6 9 17 18 34 51 71 102 142 153 213 306 426 639 1,207 1,278 2,414 3,621 7,242 10,863 21,726

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

21,726 10,863 32,590 16,295 48,886 24,443 73,330 36,665 109,996 54,998 27,499 82,498 41,249 123,748 61,874 30,937 92,812 46,406 23,203 69,610 34,805 104,416 52,208 26,104 13,052 6,526 3,263 9,790 4,895 14,686 7,343 22,030 11,015 33,046 16,523 49,570 24,785 74,356 37,178 18,589 55,768 27,884 13,942 6,971 20,914 10,457 31,372 15,686 7,843 23,530 11,765 35,296 17,648 8,824 4,412 2,206 1,103 3,310 1,655 4,966

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