20405285

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{2801}}^1$

素因数の和:2884

約数の個数: 16

約数和(自身を含む): 25823232

約数和(自身を除く): 5417947

約数列:

[1, 5, 31, 47, 155, 235, 1457, 2801, 7285, 14005, 86831, 131647, 434155, 658235, 4081057, 20405285]

約数ペア:

[(1, 20405285), (5, 4081057), (31, 658235), (47, 434155), (155, 131647), (235, 86831), (1457, 14005), (2801, 7285)]