21387644

素因数分解:

$2^2\times {\mathrm{31}}^1\times {\mathrm{173}}^1\times {\mathrm{997}}^1$

素因数の和:1205

約数の個数: 24

約数和(自身を含む): 38898048

約数和(自身を除く): 17510404

約数列:

[1, 2, 4, 31, 62, 124, 173, 346, 692, 997, 1994, 3988, 5363, 10726, 21452, 30907, 61814, 123628, 172481, 344962, 689924, 5346911, 10693822, 21387644]

約数ペア:

[(1, 21387644), (2, 10693822), (4, 5346911), (31, 689924), (62, 344962), (124, 172481), (173, 123628), (346, 61814), (692, 30907), (997, 21452), (1994, 10726), (3988, 5363)]