21111255

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{42649}}^1$

素因数の和:42671

約数の個数: 24

約数和(自身を含む): 39920400

約数和(自身を除く): 18809145

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 55, 99, 165, 495, 42649, 127947, 213245, 383841, 469139, 639735, 1407417, 1919205, 2345695, 4222251, 7037085, 21111255]

約数ペア:

[(1, 21111255), (3, 7037085), (5, 4222251), (9, 2345695), (11, 1919205), (15, 1407417), (33, 639735), (45, 469139), (55, 383841), (99, 213245), (165, 127947), (495, 42649)]