31408881

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{223}}^1\times {\mathrm{353}}^1$

素因数の和:605

約数の個数: 32

約数和(自身を含む): 50749440

約数和(自身を除く): 19340559

約数列:

[1, 3, 7, 19, 21, 57, 133, 223, 353, 399, 669, 1059, 1561, 2471, 4237, 4683, 6707, 7413, 12711, 20121, 29659, 46949, 78719, 88977, 140847, 236157, 551033, 1495661, 1653099, 4486983, 10469627, 31408881]

約数ペア:

[(1, 31408881), (3, 10469627), (7, 4486983), (19, 1653099), (21, 1495661), (57, 551033), (133, 236157), (223, 140847), (353, 88977), (399, 78719), (669, 46949), (1059, 29659), (1561, 20121), (2471, 12711), (4237, 7413), (4683, 6707)]