656084020

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{491}}^1\times {\mathrm{941}}^1$

素因数の和:1512

約数の個数: 48

約数和(自身を含む): 1401515136

約数和(自身を除く): 745431116

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 491, 710, 941, 982, 1420, 1882, 1964, 2455, 3764, 4705, 4910, 9410, 9820, 18820, 34861, 66811, 69722, 133622, 139444, 174305, 267244, 334055, 348610, 462031, 668110, 697220, 924062, 1336220, 1848124, 2310155, 4620310, 9240620, 32804201, 65608402, 131216804, 164021005, 328042010, 656084020]

約数ペア:

[(1, 656084020), (2, 328042010), (4, 164021005), (5, 131216804), (10, 65608402), (20, 32804201), (71, 9240620), (142, 4620310), (284, 2310155), (355, 1848124), (491, 1336220), (710, 924062), (941, 697220), (982, 668110), (1420, 462031), (1882, 348610), (1964, 334055), (2455, 267244), (3764, 174305), (4705, 139444), (4910, 133622), (9410, 69722), (9820, 66811), (18820, 34861)]