21620404

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{277}}^1$

素因数の和:392

約数の個数: 48

約数和(自身を含む): 43590400

約数和(自身を除く): 21969996

約数列:

[1, 2, 4, 13, 19, 26, 38, 52, 76, 79, 158, 247, 277, 316, 494, 554, 988, 1027, 1108, 1501, 2054, 3002, 3601, 4108, 5263, 6004, 7202, 10526, 14404, 19513, 21052, 21883, 39026, 43766, 68419, 78052, 87532, 136838, 273676, 284479, 415777, 568958, 831554, 1137916, 1663108, 5405101, 10810202, 21620404]

約数ペア:

[(1, 21620404), (2, 10810202), (4, 5405101), (13, 1663108), (19, 1137916), (26, 831554), (38, 568958), (52, 415777), (76, 284479), (79, 273676), (158, 136838), (247, 87532), (277, 78052), (316, 68419), (494, 43766), (554, 39026), (988, 21883), (1027, 21052), (1108, 19513), (1501, 14404), (2054, 10526), (3002, 7202), (3601, 6004), (4108, 5263)]