1388404780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{197}}^1\times {\mathrm{50341}}^1$

素因数の和:50554

約数の個数: 48

約数和(自身を含む): 3349152576

約数和(自身を除く): 1960747796

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 197, 394, 788, 985, 1379, 1970, 2758, 3940, 5516, 6895, 13790, 27580, 50341, 100682, 201364, 251705, 352387, 503410, 704774, 1006820, 1409548, 1761935, 3523870, 7047740, 9917177, 19834354, 39668708, 49585885, 69420239, 99171770, 138840478, 198343540, 277680956, 347101195, 694202390, 1388404780]

約数ペア:

[(1, 1388404780), (2, 694202390), (4, 347101195), (5, 277680956), (7, 198343540), (10, 138840478), (14, 99171770), (20, 69420239), (28, 49585885), (35, 39668708), (70, 19834354), (140, 9917177), (197, 7047740), (394, 3523870), (788, 1761935), (985, 1409548), (1379, 1006820), (1970, 704774), (2758, 503410), (3940, 352387), (5516, 251705), (6895, 201364), (13790, 100682), (27580, 50341)]