21931161

素因数分解:

$3^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{149}}^1\times {\mathrm{163}}^1$

素因数の和:365

約数の個数: 32

約数和(自身を含む): 34636800

約数和(自身を除く): 12705639

約数列:

[1, 3, 7, 21, 43, 129, 149, 163, 301, 447, 489, 903, 1043, 1141, 3129, 3423, 6407, 7009, 19221, 21027, 24287, 44849, 49063, 72861, 134547, 147189, 170009, 510027, 1044341, 3133023, 7310387, 21931161]

約数ペア:

[(1, 21931161), (3, 7310387), (7, 3133023), (21, 1044341), (43, 510027), (129, 170009), (149, 147189), (163, 134547), (301, 72861), (447, 49063), (489, 44849), (903, 24287), (1043, 21027), (1141, 19221), (3129, 7009), (3423, 6407)]