21289424

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{5387}}^1$

素因数の和:5427

約数の個数: 40

約数和(自身を含む): 46767840

約数和(自身を除く): 25478416

約数列:

[1, 2, 4, 8, 13, 16, 19, 26, 38, 52, 76, 104, 152, 208, 247, 304, 494, 988, 1976, 3952, 5387, 10774, 21548, 43096, 70031, 86192, 102353, 140062, 204706, 280124, 409412, 560248, 818824, 1120496, 1330589, 1637648, 2661178, 5322356, 10644712, 21289424]

約数ペア:

[(1, 21289424), (2, 10644712), (4, 5322356), (8, 2661178), (13, 1637648), (16, 1330589), (19, 1120496), (26, 818824), (38, 560248), (52, 409412), (76, 280124), (104, 204706), (152, 140062), (208, 102353), (247, 86192), (304, 70031), (494, 43096), (988, 21548), (1976, 10774), (3952, 5387)]