256880080

素因数分解:

$2^4\times 5^1\times {\mathrm{3211001}}^1$

素因数の和:3211014

約数の個数: 20

約数和(自身を含む): 597246372

約数和(自身を除く): 340366292

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 3211001, 6422002, 12844004, 16055005, 25688008, 32110010, 51376016, 64220020, 128440040, 256880080]

約数ペア:

[(1, 256880080), (2, 128440040), (4, 64220020), (5, 51376016), (8, 32110010), (10, 25688008), (16, 16055005), (20, 12844004), (40, 6422002), (80, 3211001)]