15,420,397

727 × 21211

15,420,397 factors as 727 × 21211. Its 4 positive divisors give a proper-divisor sum of 21,939, so this integer is deficient. The Collatz stopping time is 218 steps.

Prime Factor Structure

Factorization String 727 × 21211

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 4

Divisor Sum (σ) 15,442,336

Proper Divisor Sum 21,939

Digit Sum / Digital Root 31 (Root: 4)

Adjacent Primes #15420367 ← → #15420401

Radix Representation

Decimal	15420397
Binary	111010110100101111101101 (24 bits)
Octal	0o72645755
Hexadecimal	0xEB4BED

Divisor Catalog (4)

1 727 21,211 15,420,397

Collatz Trajectory (218 steps to reach 1)

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

15,420,397 46,261,192 23,130,596 11,565,298 5,782,649 17,347,948 8,673,974 4,336,987 13,010,962 6,505,481 19,516,444 9,758,222 4,879,111 14,637,334 7,318,667 21,956,002 10,978,001 32,934,004 16,467,002 8,233,501 24,700,504 12,350,252 6,175,126 3,087,563 9,262,690 4,631,345 13,894,036 6,947,018 3,473,509 10,420,528 5,210,264 2,605,132 1,302,566 651,283 1,953,850 976,925 2,930,776 1,465,388 732,694 366,347 1,099,042 549,521 1,648,564 824,282 412,141 1,236,424 618,212 309,106 154,553 463,660 231,830 115,915 347,746 173,873 521,620 260,810 130,405 391,216 195,608 97,804

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