31420917

素因数分解:

$3^2\times {\mathrm{11}}^3\times {\mathrm{43}}^1\times {\mathrm{61}}^1$

素因数の和:143

約数の個数: 48

約数和(自身を含む): 51919296

約数和(自身を除く): 20498379

約数列:

[1, 3, 9, 11, 33, 43, 61, 99, 121, 129, 183, 363, 387, 473, 549, 671, 1089, 1331, 1419, 2013, 2623, 3993, 4257, 5203, 6039, 7381, 7869, 11979, 15609, 22143, 23607, 28853, 46827, 57233, 66429, 81191, 86559, 171699, 243573, 259677, 317383, 515097, 730719, 952149, 2856447, 3491213, 10473639, 31420917]

約数ペア:

[(1, 31420917), (3, 10473639), (9, 3491213), (11, 2856447), (33, 952149), (43, 730719), (61, 515097), (99, 317383), (121, 259677), (129, 243573), (183, 171699), (363, 86559), (387, 81191), (473, 66429), (549, 57233), (671, 46827), (1089, 28853), (1331, 23607), (1419, 22143), (2013, 15609), (2623, 11979), (3993, 7869), (4257, 7381), (5203, 6039)]