20496905

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{263}}^1$

素因数の和:401

約数の個数: 32

約数和(自身を含む): 29272320

約数和(自身を除く): 8775415

約数列:

[1, 5, 11, 13, 55, 65, 109, 143, 263, 545, 715, 1199, 1315, 1417, 2893, 3419, 5995, 7085, 14465, 15587, 17095, 28667, 37609, 77935, 143335, 188045, 315337, 372671, 1576685, 1863355, 4099381, 20496905]

約数ペア:

[(1, 20496905), (5, 4099381), (11, 1863355), (13, 1576685), (55, 372671), (65, 315337), (109, 188045), (143, 143335), (263, 77935), (545, 37609), (715, 28667), (1199, 17095), (1315, 15587), (1417, 14465), (2893, 7085), (3419, 5995)]