18742945

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{41}}^1\times {\mathrm{541}}^1$

素因数の和:613

約数の個数: 24

約数和(自身を含む): 24994872

約数和(自身を除く): 6251927

約数列:

[1, 5, 13, 41, 65, 169, 205, 533, 541, 845, 2665, 2705, 6929, 7033, 22181, 34645, 35165, 91429, 110905, 288353, 457145, 1441765, 3748589, 18742945]

約数ペア:

[(1, 18742945), (5, 3748589), (13, 1441765), (41, 457145), (65, 288353), (169, 110905), (205, 91429), (533, 35165), (541, 34645), (845, 22181), (2665, 7033), (2705, 6929)]