Divisor count d(n) --- erratic arithmetic function averaging ~ln(n), spikes at highly composite numbers, modulated by prime factorization structure
Standard analysis sees: heavy-tailed; right-skewed; anti-correlated (alternating); anti-persistent; blue spectrum (high-frequency power). The atlas finds no named structure, but the source is distinctively extreme on Septagonal (Danzer):z_primary (-2.6z) — beyond what the standard bank predicts for it.
Septagonal (Danzer):z_primary | -2.6z | bank-miss 1.2σ |
Septagonal (Danzer):cubic_coherence | -2.1z | bank-miss 1.6σ |









_(centered)/signed_log_z/Divisor_Count.png)
_(centered)/xy_path/Divisor_Count.png)

/barcode/Divisor_Count.png)
/d_curve/Divisor_Count.png)








/phi_spectrum/Divisor_Count.png)










/default/Divisor_Count.png)
/default/Divisor_Count.png)


| Nearest neighbor | Distance | |
|---|---|---|
| Prime Gaps | 3.78 | |
| Aliquot Orbit Lengths | 3.87 | |
| Collatz Flights | 4.04 |
2-adic › 2-adic:valuation_transition_predictability | rank 304/307 | 0.3507 |
Zipf–Mandelbrot (16-bit) › Zipf–Mandelbrot (16-bit):zipf_r_squared | rank 4/307 | 0.9877 |