28647801

素因数分解:

$3^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{263}}^1$

素因数の和:315

約数の個数: 72

約数和(自身を含む): 54774720

約数和(自身を除く): 26126919

約数列:

[1, 3, 7, 9, 13, 19, 21, 39, 49, 57, 63, 91, 117, 133, 147, 171, 247, 263, 273, 399, 441, 637, 741, 789, 819, 931, 1197, 1729, 1841, 1911, 2223, 2367, 2793, 3419, 4997, 5187, 5523, 5733, 8379, 10257, 12103, 12887, 14991, 15561, 16569, 23933, 30771, 34979, 36309, 38661, 44973, 64961, 71799, 104937, 108927, 115983, 167531, 194883, 215397, 244853, 314811, 454727, 502593, 584649, 734559, 1364181, 1507779, 2203677, 3183089, 4092543, 9549267, 28647801]

約数ペア:

[(1, 28647801), (3, 9549267), (7, 4092543), (9, 3183089), (13, 2203677), (19, 1507779), (21, 1364181), (39, 734559), (49, 584649), (57, 502593), (63, 454727), (91, 314811), (117, 244853), (133, 215397), (147, 194883), (171, 167531), (247, 115983), (263, 108927), (273, 104937), (399, 71799), (441, 64961), (637, 44973), (741, 38661), (789, 36309), (819, 34979), (931, 30771), (1197, 23933), (1729, 16569), (1841, 15561), (1911, 14991), (2223, 12887), (2367, 12103), (2793, 10257), (3419, 8379), (4997, 5733), (5187, 5523)]