19797505

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{3347}}^1$

素因数の和:3385

約数の個数: 24

約数和(自身を含む): 29408832

約数和(自身を除く): 9611327

約数列:

[1, 5, 7, 13, 35, 65, 91, 169, 455, 845, 1183, 3347, 5915, 16735, 23429, 43511, 117145, 217555, 304577, 565643, 1522885, 2828215, 3959501, 19797505]

約数ペア:

[(1, 19797505), (5, 3959501), (7, 2828215), (13, 1522885), (35, 565643), (65, 304577), (91, 217555), (169, 117145), (455, 43511), (845, 23429), (1183, 16735), (3347, 5915)]