257788360

素因数分解:

$2^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{63809}}^1$

素因数の和:63921

約数の個数: 32

約数和(自身を含む): 585775800

約数和(自身を除く): 327987440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 101, 202, 404, 505, 808, 1010, 2020, 4040, 63809, 127618, 255236, 319045, 510472, 638090, 1276180, 2552360, 6444709, 12889418, 25778836, 32223545, 51557672, 64447090, 128894180, 257788360]

約数ペア:

[(1, 257788360), (2, 128894180), (4, 64447090), (5, 51557672), (8, 32223545), (10, 25778836), (20, 12889418), (40, 6444709), (101, 2552360), (202, 1276180), (404, 638090), (505, 510472), (808, 319045), (1010, 255236), (2020, 127618), (4040, 63809)]