21498291

素因数分解:

$3^4\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{229}}^1$

素因数の和:321

約数の個数: 40

約数和(自身を含む): 34509200

約数和(自身を除く): 13010909

約数列:

[1, 3, 9, 19, 27, 57, 61, 81, 171, 183, 229, 513, 549, 687, 1159, 1539, 1647, 2061, 3477, 4351, 4941, 6183, 10431, 13053, 13969, 18549, 31293, 39159, 41907, 93879, 117477, 125721, 265411, 352431, 377163, 796233, 1131489, 2388699, 7166097, 21498291]

約数ペア:

[(1, 21498291), (3, 7166097), (9, 2388699), (19, 1131489), (27, 796233), (57, 377163), (61, 352431), (81, 265411), (171, 125721), (183, 117477), (229, 93879), (513, 41907), (549, 39159), (687, 31293), (1159, 18549), (1539, 13969), (1647, 13053), (2061, 10431), (3477, 6183), (4351, 4941)]