20428278

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{193}}^1$

素因数の和:293

約数の個数: 64

約数和(自身を含む): 46932480

約数和(自身を除く): 26504202

約数列:

[1, 2, 3, 6, 13, 23, 26, 39, 46, 59, 69, 78, 118, 138, 177, 193, 299, 354, 386, 579, 598, 767, 897, 1158, 1357, 1534, 1794, 2301, 2509, 2714, 4071, 4439, 4602, 5018, 7527, 8142, 8878, 11387, 13317, 15054, 17641, 22774, 26634, 34161, 35282, 52923, 57707, 68322, 105846, 115414, 148031, 173121, 261901, 296062, 346242, 444093, 523802, 785703, 888186, 1571406, 3404713, 6809426, 10214139, 20428278]

約数ペア:

[(1, 20428278), (2, 10214139), (3, 6809426), (6, 3404713), (13, 1571406), (23, 888186), (26, 785703), (39, 523802), (46, 444093), (59, 346242), (69, 296062), (78, 261901), (118, 173121), (138, 148031), (177, 115414), (193, 105846), (299, 68322), (354, 57707), (386, 52923), (579, 35282), (598, 34161), (767, 26634), (897, 22774), (1158, 17641), (1357, 15054), (1534, 13317), (1794, 11387), (2301, 8878), (2509, 8142), (2714, 7527), (4071, 5018), (4439, 4602)]