15,863,861

13² × 37 × 43 × 59

15,863,861 factors as 13^2 × 37 × 43 × 59. Its 24 positive divisors give a proper-divisor sum of 2,494,699, so this integer is deficient. The Collatz stopping time is 125 steps.

Prime Factor Structure

Factorization String 13^2 × 37 × 43 × 59

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 24

Divisor Sum (σ) 18,358,560

Proper Divisor Sum 2,494,699

Digit Sum / Digital Root 38 (Root: 2)

Adjacent Primes #15863857 ← → #15863891

Radix Representation

Decimal	15863861
Binary	111100100001000000110101 (24 bits)
Octal	0o74410065
Hexadecimal	0xF21035

Divisor Catalog (24)

Collatz Trajectory (125 steps to reach 1)

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

15,863,861 47,591,584 23,795,792 11,897,896 5,948,948 2,974,474 1,487,237 4,461,712 2,230,856 1,115,428 557,714 278,857 836,572 418,286 209,143 627,430 313,715 941,146 470,573 1,411,720 705,860 352,930 176,465 529,396 264,698 132,349 397,048 198,524 99,262 49,631 148,894 74,447 223,342 111,671 335,014 167,507 502,522 251,261 753,784 376,892 188,446 94,223 282,670 141,335 424,006 212,003 636,010 318,005 954,016 477,008 238,504 119,252 59,626 29,813 89,440 44,720 22,360 11,180 5,590 2,795

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