2 × 3² × 7² × 13 × 19

Prime Factor Structure

Factorization String 2 × 3^2 × 7^2 × 13 × 19

Distinct Prime Factors 5

Square Status No

Abundance Measure Abundant

Analytical Properties

Total Divisors 72

Divisor Sum (σ) 622,440

Proper Divisor Sum 404,586

Digit Sum / Digital Root 27 (Root: 9)

Adjacent Primes #217849 ← → #217859

1 2 3 6 7 9 13 14 18 19 21 26 38 39 42 49 57 63 78 91 98 114 117 126 133 147 171 182 234 247 266 273 294 342 399 441 494 546 637 741 798 819 882 931 1,197 1,274 1,482 1,638 1,729 1,862 1,911 2,223 2,394 2,793 3,458 3,822 4,446 5,187 5,586 5,733

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

217,854 108,927 326,782 163,391 490,174 245,087 735,262 367,631 1,102,894 551,447 1,654,342 827,171 2,481,514 1,240,757 3,722,272 1,861,136 930,568 465,284 232,642 116,321 348,964 174,482 87,241 261,724 130,862 65,431 196,294 98,147 294,442 147,221 441,664 220,832 110,416 55,208 27,604 13,802 6,901 20,704 10,352 5,176 2,588 1,294 647 1,942 971 2,914 1,457 4,372 2,186 1,093 3,280 1,640 820 410 205 616 308 154 77 232

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