20866825

素因数分解:

$5^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{59}}^1$

素因数の和:166

約数の個数: 48

約数和(自身を含む): 31426560

約数和(自身を除く): 10559735

約数列:

[1, 5, 7, 25, 35, 43, 47, 59, 175, 215, 235, 295, 301, 329, 413, 1075, 1175, 1475, 1505, 1645, 2021, 2065, 2537, 2773, 7525, 8225, 10105, 10325, 12685, 13865, 14147, 17759, 19411, 50525, 63425, 69325, 70735, 88795, 97055, 119239, 353675, 443975, 485275, 596195, 834673, 2980975, 4173365, 20866825]

約数ペア:

[(1, 20866825), (5, 4173365), (7, 2980975), (25, 834673), (35, 596195), (43, 485275), (47, 443975), (59, 353675), (175, 119239), (215, 97055), (235, 88795), (295, 70735), (301, 69325), (329, 63425), (413, 50525), (1075, 19411), (1175, 17759), (1475, 14147), (1505, 13865), (1645, 12685), (2021, 10325), (2065, 10105), (2537, 8225), (2773, 7525)]