20393163

素因数分解:

$3^2\times 7^2\times {\mathrm{131}}^1\times {\mathrm{353}}^1$

素因数の和:504

約数の個数: 36

約数和(自身を含む): 34625448

約数和(自身を除く): 14232285

約数列:

[1, 3, 7, 9, 21, 49, 63, 131, 147, 353, 393, 441, 917, 1059, 1179, 2471, 2751, 3177, 6419, 7413, 8253, 17297, 19257, 22239, 46243, 51891, 57771, 138729, 155673, 323701, 416187, 971103, 2265907, 2913309, 6797721, 20393163]

約数ペア:

[(1, 20393163), (3, 6797721), (7, 2913309), (9, 2265907), (21, 971103), (49, 416187), (63, 323701), (131, 155673), (147, 138729), (353, 57771), (393, 51891), (441, 46243), (917, 22239), (1059, 19257), (1179, 17297), (2471, 8253), (2751, 7413), (3177, 6419)]