21566691

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{4349}}^1$

素因数の和:4403

約数の個数: 24

約数和(自身を含む): 33930000

約数和(自身を除く): 12363309

約数列:

[1, 3, 9, 19, 29, 57, 87, 171, 261, 551, 1653, 4349, 4959, 13047, 39141, 82631, 126121, 247893, 378363, 743679, 1135089, 2396299, 7188897, 21566691]

約数ペア:

[(1, 21566691), (3, 7188897), (9, 2396299), (19, 1135089), (29, 743679), (57, 378363), (87, 247893), (171, 126121), (261, 82631), (551, 39141), (1653, 13047), (4349, 4959)]