20405987

素因数分解:

$7^1\times {\mathrm{41}}^1\times {\mathrm{97}}^1\times {\mathrm{733}}^1$

素因数の和:878

約数の個数: 16

約数和(自身を含む): 24169152

約数和(自身を除く): 3763165

約数列:

[1, 7, 41, 97, 287, 679, 733, 3977, 5131, 27839, 30053, 71101, 210371, 497707, 2915141, 20405987]

約数ペア:

[(1, 20405987), (7, 2915141), (41, 497707), (97, 210371), (287, 71101), (679, 30053), (733, 27839), (3977, 5131)]