18128525

素因数分解:

$5^2\times {\mathrm{67}}^1\times {\mathrm{79}}^1\times {\mathrm{137}}^1$

素因数の和:293

約数の個数: 24

約数和(自身を含む): 23272320

約数和(自身を除く): 5143795

約数列:

[1, 5, 25, 67, 79, 137, 335, 395, 685, 1675, 1975, 3425, 5293, 9179, 10823, 26465, 45895, 54115, 132325, 229475, 270575, 725141, 3625705, 18128525]

約数ペア:

[(1, 18128525), (5, 3625705), (25, 725141), (67, 270575), (79, 229475), (137, 132325), (335, 54115), (395, 45895), (685, 26465), (1675, 10823), (1975, 9179), (3425, 5293)]