20178880016

素因数分解:

$2^4\times {\mathrm{2579}}^1\times {\mathrm{489019}}^1$

素因数の和:491606

約数の個数: 20

約数和(自身を含む): 39111819600

約数和(自身を除く): 18932939584

約数列:

[1, 2, 4, 8, 16, 2579, 5158, 10316, 20632, 41264, 489019, 978038, 1956076, 3912152, 7824304, 1261180001, 2522360002, 5044720004, 10089440008, 20178880016]

約数ペア:

[(1, 20178880016), (2, 10089440008), (4, 5044720004), (8, 2522360002), (16, 1261180001), (2579, 7824304), (5158, 3912152), (10316, 1956076), (20632, 978038), (41264, 489019)]