21540129

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{709}}^1$

素因数の和:785

約数の個数: 32

約数和(自身を含む): 33398400

約数和(自身を除く): 11858271

約数列:

[1, 3, 13, 19, 39, 41, 57, 123, 247, 533, 709, 741, 779, 1599, 2127, 2337, 9217, 10127, 13471, 27651, 29069, 30381, 40413, 87207, 175123, 377897, 525369, 552311, 1133691, 1656933, 7180043, 21540129]

約数ペア:

[(1, 21540129), (3, 7180043), (13, 1656933), (19, 1133691), (39, 552311), (41, 525369), (57, 377897), (123, 175123), (247, 87207), (533, 40413), (709, 30381), (741, 29069), (779, 27651), (1599, 13471), (2127, 10127), (2337, 9217)]