20494340

素因数分解:

$2^2\times 5^1\times {\mathrm{491}}^1\times {\mathrm{2087}}^1$

素因数の和:2587

約数の個数: 24

約数和(自身を含む): 43146432

約数和(自身を除く): 22652092

約数列:

[1, 2, 4, 5, 10, 20, 491, 982, 1964, 2087, 2455, 4174, 4910, 8348, 9820, 10435, 20870, 41740, 1024717, 2049434, 4098868, 5123585, 10247170, 20494340]

約数ペア:

[(1, 20494340), (2, 10247170), (4, 5123585), (5, 4098868), (10, 2049434), (20, 1024717), (491, 41740), (982, 20870), (1964, 10435), (2087, 9820), (2455, 8348), (4174, 4910)]