643304997

素因数分解:

$3^4\times {\mathrm{431}}^1\times {\mathrm{18427}}^1$

素因数の和:18870

約数の個数: 20

約数和(自身を含む): 963268416

約数和(自身を除く): 319963419

約数列:

[1, 3, 9, 27, 81, 431, 1293, 3879, 11637, 18427, 34911, 55281, 165843, 497529, 1492587, 7942037, 23826111, 71478333, 214434999, 643304997]

約数ペア:

[(1, 643304997), (3, 214434999), (9, 71478333), (27, 23826111), (81, 7942037), (431, 1492587), (1293, 497529), (3879, 165843), (11637, 55281), (18427, 34911)]