640871

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1$

素因数の和:95

約数の個数: 24

約数和(自身を含む): 861840

約数和(自身を除く): 220969

約数列:

[1, 7, 11, 29, 41, 49, 77, 203, 287, 319, 451, 539, 1189, 1421, 2009, 2233, 3157, 8323, 13079, 15631, 22099, 58261, 91553, 640871]

約数ペア:

[(1, 640871), (7, 91553), (11, 58261), (29, 22099), (41, 15631), (49, 13079), (77, 8323), (203, 3157), (287, 2233), (319, 2009), (451, 1421), (539, 1189)]