21404728

素因数分解:

$2^3\times {\mathrm{59}}^1\times {\mathrm{101}}^1\times {\mathrm{449}}^1$

素因数の和:615

約数の個数: 32

約数和(自身を含む): 41310000

約数和(自身を除く): 19905272

約数列:

[1, 2, 4, 8, 59, 101, 118, 202, 236, 404, 449, 472, 808, 898, 1796, 3592, 5959, 11918, 23836, 26491, 45349, 47672, 52982, 90698, 105964, 181396, 211928, 362792, 2675591, 5351182, 10702364, 21404728]

約数ペア:

[(1, 21404728), (2, 10702364), (4, 5351182), (8, 2675591), (59, 362792), (101, 211928), (118, 181396), (202, 105964), (236, 90698), (404, 52982), (449, 47672), (472, 45349), (808, 26491), (898, 23836), (1796, 11918), (3592, 5959)]