21951657

素因数分解:

$3^2\times 7^3\times {\mathrm{13}}^1\times {\mathrm{547}}^1$

素因数の和:587

約数の個数: 48

約数和(自身を含む): 39894400

約数和(自身を除く): 17942743

約数列:

[1, 3, 7, 9, 13, 21, 39, 49, 63, 91, 117, 147, 273, 343, 441, 547, 637, 819, 1029, 1641, 1911, 3087, 3829, 4459, 4923, 5733, 7111, 11487, 13377, 21333, 26803, 34461, 40131, 49777, 63999, 80409, 149331, 187621, 241227, 348439, 447993, 562863, 1045317, 1688589, 2439073, 3135951, 7317219, 21951657]

約数ペア:

[(1, 21951657), (3, 7317219), (7, 3135951), (9, 2439073), (13, 1688589), (21, 1045317), (39, 562863), (49, 447993), (63, 348439), (91, 241227), (117, 187621), (147, 149331), (273, 80409), (343, 63999), (441, 49777), (547, 40131), (637, 34461), (819, 26803), (1029, 21333), (1641, 13377), (1911, 11487), (3087, 7111), (3829, 5733), (4459, 4923)]