21357531

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{277}}^1\times {\mathrm{659}}^1$

素因数の和:955

約数の個数: 24

約数和(自身を含む): 33393360

約数和(自身を除く): 12035829

約数列:

[1, 3, 9, 13, 39, 117, 277, 659, 831, 1977, 2493, 3601, 5931, 8567, 10803, 25701, 32409, 77103, 182543, 547629, 1642887, 2373059, 7119177, 21357531]

約数ペア:

[(1, 21357531), (3, 7119177), (9, 2373059), (13, 1642887), (39, 547629), (117, 182543), (277, 77103), (659, 32409), (831, 25701), (1977, 10803), (2493, 8567), (3601, 5931)]