18180981

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{281}}^1$

素因数の和:386

約数の個数: 48

約数和(自身を含む): 32847360

約数和(自身を除く): 14666379

約数列:

[1, 3, 7, 9, 13, 21, 39, 63, 79, 91, 117, 237, 273, 281, 553, 711, 819, 843, 1027, 1659, 1967, 2529, 3081, 3653, 4977, 5901, 7189, 9243, 10959, 17703, 21567, 22199, 25571, 32877, 64701, 66597, 76713, 155393, 199791, 230139, 288587, 466179, 865761, 1398537, 2020109, 2597283, 6060327, 18180981]

約数ペア:

[(1, 18180981), (3, 6060327), (7, 2597283), (9, 2020109), (13, 1398537), (21, 865761), (39, 466179), (63, 288587), (79, 230139), (91, 199791), (117, 155393), (237, 76713), (273, 66597), (281, 64701), (553, 32877), (711, 25571), (819, 22199), (843, 21567), (1027, 17703), (1659, 10959), (1967, 9243), (2529, 7189), (3081, 5901), (3653, 4977)]