81578416

素因数分解:

$2^4\times {\mathrm{131}}^1\times {\mathrm{38921}}^1$

素因数の和:39060

約数の個数: 20

約数和(自身を含む): 159268824

約数和(自身を除く): 77690408

約数列:

[1, 2, 4, 8, 16, 131, 262, 524, 1048, 2096, 38921, 77842, 155684, 311368, 622736, 5098651, 10197302, 20394604, 40789208, 81578416]

約数ペア:

[(1, 81578416), (2, 40789208), (4, 20394604), (8, 10197302), (16, 5098651), (131, 622736), (262, 311368), (524, 155684), (1048, 77842), (2096, 38921)]