2⁴ × 5 × 1721

Prime Factor Structure

Factorization String 2^4 × 5 × 1721

Distinct Prime Factors 3

Square Status No

Abundance Measure Abundant

Analytical Properties

Total Divisors 20

Divisor Sum (σ) 320,292

Proper Divisor Sum 182,612

Digit Sum / Digital Root 25 (Root: 7)

Adjacent Primes #137659 ← → #137699

1 2 4 5 8 10 16 20 40 80 1,721 3,442 6,884 8,605 13,768 17,210 27,536 34,420 68,840 137,680

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

137,680 68,840 34,420 17,210 8,605 25,816 12,908 6,454 3,227 9,682 4,841 14,524 7,262 3,631 10,894 5,447 16,342 8,171 24,514 12,257 36,772 18,386 9,193 27,580 13,790 6,895 20,686 10,343 31,030 15,515 46,546 23,273 69,820 34,910 17,455 52,366 26,183 78,550 39,275 117,826 58,913 176,740 88,370 44,185 132,556 66,278 33,139 99,418 49,709 149,128 74,564 37,282 18,641 55,924 27,962 13,981 41,944 20,972 10,486 5,243

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