639779946

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{193}}^1\times {\mathrm{42499}}^1$

素因数の和:42710

約数の個数: 32

約数和(自身を含む): 1385160000

約数和(自身を除く): 745380054

約数列:

[1, 2, 3, 6, 13, 26, 39, 78, 193, 386, 579, 1158, 2509, 5018, 7527, 15054, 42499, 84998, 127497, 254994, 552487, 1104974, 1657461, 3314922, 8202307, 16404614, 24606921, 49213842, 106629991, 213259982, 319889973, 639779946]

約数ペア:

[(1, 639779946), (2, 319889973), (3, 213259982), (6, 106629991), (13, 49213842), (26, 24606921), (39, 16404614), (78, 8202307), (193, 3314922), (386, 1657461), (579, 1104974), (1158, 552487), (2509, 254994), (5018, 127497), (7527, 84998), (15054, 42499)]