81193749

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{67}}^1\times {\mathrm{193}}^1$

素因数の和:306

約数の個数: 64

約数和(自身を含む): 141840384

約数和(自身を除く): 60646635

約数列:

[1, 3, 7, 13, 21, 23, 39, 67, 69, 91, 161, 193, 201, 273, 299, 469, 483, 579, 871, 897, 1351, 1407, 1541, 2093, 2509, 2613, 4053, 4439, 4623, 6097, 6279, 7527, 10787, 12931, 13317, 17563, 18291, 20033, 31073, 32361, 38793, 52689, 57707, 60099, 90517, 93219, 140231, 168103, 173121, 271551, 297413, 403949, 420693, 504309, 892239, 1176721, 1211847, 2081891, 3530163, 3866369, 6245673, 11599107, 27064583, 81193749]

約数ペア:

[(1, 81193749), (3, 27064583), (7, 11599107), (13, 6245673), (21, 3866369), (23, 3530163), (39, 2081891), (67, 1211847), (69, 1176721), (91, 892239), (161, 504309), (193, 420693), (201, 403949), (273, 297413), (299, 271551), (469, 173121), (483, 168103), (579, 140231), (871, 93219), (897, 90517), (1351, 60099), (1407, 57707), (1541, 52689), (2093, 38793), (2509, 32361), (2613, 31073), (4053, 20033), (4439, 18291), (4623, 17563), (6097, 13317), (6279, 12931), (7527, 10787)]