20891409

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{90439}}^1$

素因数の和:90460

約数の個数: 16

約数和(自身を含む): 34728960

約数和(自身を除く): 13837551

約数列:

[1, 3, 7, 11, 21, 33, 77, 231, 90439, 271317, 633073, 994829, 1899219, 2984487, 6963803, 20891409]

約数ペア:

[(1, 20891409), (3, 6963803), (7, 2984487), (11, 1899219), (21, 994829), (33, 633073), (77, 271317), (231, 90439)]