19748020

素因数分解:

$2^2\times 5^1\times {\mathrm{491}}^1\times {\mathrm{2011}}^1$

素因数の和:2511

約数の個数: 24

約数和(自身を含む): 41575968

約数和(自身を除く): 21827948

約数列:

[1, 2, 4, 5, 10, 20, 491, 982, 1964, 2011, 2455, 4022, 4910, 8044, 9820, 10055, 20110, 40220, 987401, 1974802, 3949604, 4937005, 9874010, 19748020]

約数ペア:

[(1, 19748020), (2, 9874010), (4, 4937005), (5, 3949604), (10, 1974802), (20, 987401), (491, 40220), (982, 20110), (1964, 10055), (2011, 9820), (2455, 8044), (4022, 4910)]