21905991

素因数分解:

$3^3\times {\mathrm{29}}^1\times {\mathrm{101}}^1\times {\mathrm{277}}^1$

素因数の和:416

約数の個数: 32

約数和(自身を含む): 34027200

約数和(自身を除く): 12121209

約数列:

[1, 3, 9, 27, 29, 87, 101, 261, 277, 303, 783, 831, 909, 2493, 2727, 2929, 7479, 8033, 8787, 24099, 26361, 27977, 72297, 79083, 83931, 216891, 251793, 755379, 811333, 2433999, 7301997, 21905991]

約数ペア:

[(1, 21905991), (3, 7301997), (9, 2433999), (27, 811333), (29, 755379), (87, 251793), (101, 216891), (261, 83931), (277, 79083), (303, 72297), (783, 27977), (831, 26361), (909, 24099), (2493, 8787), (2727, 8033), (2929, 7479)]