21307384

素因数分解:

$2^3\times 7^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{233}}^1$

素因数の和:340

約数の個数: 64

約数和(自身を含む): 48522240

約数和(自身を除く): 27214856

約数列:

[1, 2, 4, 7, 8, 14, 23, 28, 46, 56, 71, 92, 142, 161, 184, 233, 284, 322, 466, 497, 568, 644, 932, 994, 1288, 1631, 1633, 1864, 1988, 3262, 3266, 3976, 5359, 6524, 6532, 10718, 11431, 13048, 13064, 16543, 21436, 22862, 33086, 37513, 42872, 45724, 66172, 75026, 91448, 115801, 132344, 150052, 231602, 300104, 380489, 463204, 760978, 926408, 1521956, 2663423, 3043912, 5326846, 10653692, 21307384]

約数ペア:

[(1, 21307384), (2, 10653692), (4, 5326846), (7, 3043912), (8, 2663423), (14, 1521956), (23, 926408), (28, 760978), (46, 463204), (56, 380489), (71, 300104), (92, 231602), (142, 150052), (161, 132344), (184, 115801), (233, 91448), (284, 75026), (322, 66172), (466, 45724), (497, 42872), (568, 37513), (644, 33086), (932, 22862), (994, 21436), (1288, 16543), (1631, 13064), (1633, 13048), (1864, 11431), (1988, 10718), (3262, 6532), (3266, 6524), (3976, 5359)]