18718287

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{1091}}^1$

素因数の和:1163

約数の個数: 32

約数和(自身を含む): 30750720

約数和(自身を除く): 12032433

約数列:

[1, 3, 7, 19, 21, 43, 57, 129, 133, 301, 399, 817, 903, 1091, 2451, 3273, 5719, 7637, 17157, 20729, 22911, 46913, 62187, 140739, 145103, 328391, 435309, 891347, 985173, 2674041, 6239429, 18718287]

約数ペア:

[(1, 18718287), (3, 6239429), (7, 2674041), (19, 985173), (21, 891347), (43, 435309), (57, 328391), (129, 145103), (133, 140739), (301, 62187), (399, 46913), (817, 22911), (903, 20729), (1091, 17157), (2451, 7637), (3273, 5719)]