21028419

素因数分解:

$3^2\times {\mathrm{43}}^1\times {\mathrm{67}}^1\times {\mathrm{811}}^1$

素因数の和:927

約数の個数: 24

約数和(自身を含む): 31583552

約数和(自身を除く): 10555133

約数列:

[1, 3, 9, 43, 67, 129, 201, 387, 603, 811, 2433, 2881, 7299, 8643, 25929, 34873, 54337, 104619, 163011, 313857, 489033, 2336491, 7009473, 21028419]

約数ペア:

[(1, 21028419), (3, 7009473), (9, 2336491), (43, 489033), (67, 313857), (129, 163011), (201, 104619), (387, 54337), (603, 34873), (811, 25929), (2433, 8643), (2881, 7299)]