20707479

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{359}}^1$

素因数の和:424

約数の個数: 48

約数和(自身を含む): 35380800

約数和(自身を除く): 14673321

約数列:

[1, 3, 9, 13, 17, 29, 39, 51, 87, 117, 153, 221, 261, 359, 377, 493, 663, 1077, 1131, 1479, 1989, 3231, 3393, 4437, 4667, 6103, 6409, 10411, 14001, 18309, 19227, 31233, 42003, 54927, 57681, 79339, 93699, 135343, 176987, 238017, 406029, 530961, 714051, 1218087, 1592883, 2300831, 6902493, 20707479]

約数ペア:

[(1, 20707479), (3, 6902493), (9, 2300831), (13, 1592883), (17, 1218087), (29, 714051), (39, 530961), (51, 406029), (87, 238017), (117, 176987), (153, 135343), (221, 93699), (261, 79339), (359, 57681), (377, 54927), (493, 42003), (663, 31233), (1077, 19227), (1131, 18309), (1479, 14001), (1989, 10411), (3231, 6409), (3393, 6103), (4437, 4667)]