40280440

素因数分解:

$2^3\times 5^1\times {\mathrm{641}}^1\times {\mathrm{1571}}^1$

素因数の和:2223

約数の個数: 32

約数和(自身を含む): 90830160

約数和(自身を除く): 50549720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 641, 1282, 1571, 2564, 3142, 3205, 5128, 6284, 6410, 7855, 12568, 12820, 15710, 25640, 31420, 62840, 1007011, 2014022, 4028044, 5035055, 8056088, 10070110, 20140220, 40280440]

約数ペア:

[(1, 40280440), (2, 20140220), (4, 10070110), (5, 8056088), (8, 5035055), (10, 4028044), (20, 2014022), (40, 1007011), (641, 62840), (1282, 31420), (1571, 25640), (2564, 15710), (3142, 12820), (3205, 12568), (5128, 7855), (6284, 6410)]