21025017

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{2531}}^1$

素因数の和:2621

約数の個数: 24

約数和(自身を含む): 33179328

約数和(自身を除く): 12154311

約数列:

[1, 3, 9, 13, 39, 71, 117, 213, 639, 923, 2531, 2769, 7593, 8307, 22779, 32903, 98709, 179701, 296127, 539103, 1617309, 2336113, 7008339, 21025017]

約数ペア:

[(1, 21025017), (3, 7008339), (9, 2336113), (13, 1617309), (39, 539103), (71, 296127), (117, 179701), (213, 98709), (639, 32903), (923, 22779), (2531, 8307), (2769, 7593)]