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28,291,136

26 × 167 × 2647
Deficient Even Composite

28,291,136 factors as 2^6 × 167 × 2647. Its 28 positive divisors give a proper-divisor sum of 28,206,592, so this integer is deficient. The Collatz stopping time is 69 steps.

Prime Factor Structure

Factorization String 2^6 × 167 × 2647
Distinct Prime Factors 3
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 28
Divisor Sum (σ) 56,497,728
Proper Divisor Sum 28,206,592
Digit Sum / Digital Root 32 (Root: 5)
Adjacent Primes #28291103 ← → #28291139

Radix Representation

Decimal 28291136
Binary 1101011111011000001000000 (25 bits)
Octal 0o153730100
Hexadecimal 0x1AFB040

Divisor Catalog (28)

1 2 4 8 16 32 64 167 334 668 1,336 2,647 2,672 5,294 5,344 10,588 10,688 21,176 42,352 84,704 169,408 442,049 884,098 1,768,196 3,536,392 7,072,784 14,145,568 28,291,136

Collatz Trajectory (69 steps to reach 1)

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

28,291,136 14,145,568 7,072,784 3,536,392 1,768,196 884,098 442,049 1,326,148 663,074 331,537 994,612 497,306 248,653 745,960 372,980 186,490 93,245 279,736 139,868 69,934 34,967 104,902 52,451 157,354 78,677 236,032 118,016 59,008 29,504 14,752 7,376 3,688 1,844 922 461 1,384 692 346 173 520 260 130 65 196 98 49 148 74 37 112 56 28 14 7 22 11 34 17 52 26

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