81408016

素因数分解:

$2^4\times {\mathrm{127}}^1\times {\mathrm{40063}}^1$

素因数の和:40198

約数の個数: 20

約数和(自身を含む): 158973952

約数和(自身を除く): 77565936

約数列:

[1, 2, 4, 8, 16, 127, 254, 508, 1016, 2032, 40063, 80126, 160252, 320504, 641008, 5088001, 10176002, 20352004, 40704008, 81408016]

約数ペア:

[(1, 81408016), (2, 40704008), (4, 20352004), (8, 10176002), (16, 5088001), (127, 641008), (254, 320504), (508, 160252), (1016, 80126), (2032, 40063)]