21288956

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{9521}}^1$

素因数の和:9581

約数の個数: 24

約数和(自身を含む): 41058864

約数和(自身を除く): 19769908

約数列:

[1, 2, 4, 13, 26, 43, 52, 86, 172, 559, 1118, 2236, 9521, 19042, 38084, 123773, 247546, 409403, 495092, 818806, 1637612, 5322239, 10644478, 21288956]

約数ペア:

[(1, 21288956), (2, 10644478), (4, 5322239), (13, 1637612), (26, 818806), (43, 495092), (52, 409403), (86, 247546), (172, 123773), (559, 38084), (1118, 19042), (2236, 9521)]