21313288

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{281}}^1\times {\mathrm{499}}^1$

素因数の和:805

約数の個数: 32

約数和(自身を含む): 42300000

約数和(自身を除く): 20986712

約数列:

[1, 2, 4, 8, 19, 38, 76, 152, 281, 499, 562, 998, 1124, 1996, 2248, 3992, 5339, 9481, 10678, 18962, 21356, 37924, 42712, 75848, 140219, 280438, 560876, 1121752, 2664161, 5328322, 10656644, 21313288]

約数ペア:

[(1, 21313288), (2, 10656644), (4, 5328322), (8, 2664161), (19, 1121752), (38, 560876), (76, 280438), (152, 140219), (281, 75848), (499, 42712), (562, 37924), (998, 21356), (1124, 18962), (1996, 10678), (2248, 9481), (3992, 5339)]