21391929

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{9623}}^1$

素因数の和:9661

約数の個数: 24

約数和(自身を含む): 35031360

約数和(自身を除く): 13639431

約数列:

[1, 3, 9, 13, 19, 39, 57, 117, 171, 247, 741, 2223, 9623, 28869, 86607, 125099, 182837, 375297, 548511, 1125891, 1645533, 2376881, 7130643, 21391929]

約数ペア:

[(1, 21391929), (3, 7130643), (9, 2376881), (13, 1645533), (19, 1125891), (39, 548511), (57, 375297), (117, 182837), (171, 125099), (247, 86607), (741, 28869), (2223, 9623)]