21539721

素因数分解:

$3^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{113}}^1\times {\mathrm{313}}^1$

素因数の和:465

約数の個数: 32

約数和(自身を含む): 34364160

約数和(自身を除く): 12824439

約数列:

[1, 3, 7, 21, 29, 87, 113, 203, 313, 339, 609, 791, 939, 2191, 2373, 3277, 6573, 9077, 9831, 22939, 27231, 35369, 63539, 68817, 106107, 190617, 247583, 742749, 1025701, 3077103, 7179907, 21539721]

約数ペア:

[(1, 21539721), (3, 7179907), (7, 3077103), (21, 1025701), (29, 742749), (87, 247583), (113, 190617), (203, 106107), (313, 68817), (339, 63539), (609, 35369), (791, 27231), (939, 22939), (2191, 9831), (2373, 9077), (3277, 6573)]