21005439

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{76943}}^1$

素因数の和:76966

約数の個数: 16

約数和(自身を含む): 34470912

約数和(自身を除く): 13465473

約数列:

[1, 3, 7, 13, 21, 39, 91, 273, 76943, 230829, 538601, 1000259, 1615803, 3000777, 7001813, 21005439]

約数ペア:

[(1, 21005439), (3, 7001813), (7, 3000777), (13, 1615803), (21, 1000259), (39, 538601), (91, 230829), (273, 76943)]