21504717

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{197}}^1\times {\mathrm{311}}^1$

素因数の和:530

約数の個数: 32

約数和(自身を含む): 34594560

約数和(自身を除く): 13089843

約数列:

[1, 3, 9, 13, 27, 39, 117, 197, 311, 351, 591, 933, 1773, 2561, 2799, 4043, 5319, 7683, 8397, 12129, 23049, 36387, 61267, 69147, 109161, 183801, 551403, 796471, 1654209, 2389413, 7168239, 21504717]

約数ペア:

[(1, 21504717), (3, 7168239), (9, 2389413), (13, 1654209), (27, 796471), (39, 551403), (117, 183801), (197, 109161), (311, 69147), (351, 61267), (591, 36387), (933, 23049), (1773, 12129), (2561, 8397), (2799, 7683), (4043, 5319)]