81278740

素因数分解:

$2^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{40237}}^1$

素因数の和:40347

約数の個数: 24

約数和(自身を含む): 172379592

約数和(自身を除く): 91100852

約数列:

[1, 2, 4, 5, 10, 20, 101, 202, 404, 505, 1010, 2020, 40237, 80474, 160948, 201185, 402370, 804740, 4063937, 8127874, 16255748, 20319685, 40639370, 81278740]

約数ペア:

[(1, 81278740), (2, 40639370), (4, 20319685), (5, 16255748), (10, 8127874), (20, 4063937), (101, 804740), (202, 402370), (404, 201185), (505, 160948), (1010, 80474), (2020, 40237)]