2² × 5 × 7² × 223

Prime Factor Structure

Factorization String 2^2 × 5 × 7^2 × 223

Distinct Prime Factors 4

Square Status No

Abundance Measure Abundant

Analytical Properties

Total Divisors 36

Divisor Sum (σ) 536,256

Proper Divisor Sum 317,716

Digit Sum / Digital Root 20 (Root: 2)

Adjacent Primes #218531 ← → #218549

1 2 4 5 7 10 14 20 28 35 49 70 98 140 196 223 245 446 490 892 980 1,115 1,561 2,230 3,122 4,460 6,244 7,805 10,927 15,610 21,854 31,220 43,708 54,635 109,270 218,540

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

218,540 109,270 54,635 163,906 81,953 245,860 122,930 61,465 184,396 92,198 46,099 138,298 69,149 207,448 103,724 51,862 25,931 77,794 38,897 116,692 58,346 29,173 87,520 43,760 21,880 10,940 5,470 2,735 8,206 4,103 12,310 6,155 18,466 9,233 27,700 13,850 6,925 20,776 10,388 5,194 2,597 7,792 3,896 1,948 974 487 1,462 731 2,194 1,097 3,292 1,646 823 2,470 1,235 3,706 1,853 5,560 2,780 1,390

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