20449780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{78653}}^1$

素因数の和:78675

約数の個数: 24

約数和(自身を含む): 46248552

約数和(自身を除く): 25798772

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 78653, 157306, 314612, 393265, 786530, 1022489, 1573060, 2044978, 4089956, 5112445, 10224890, 20449780]

約数ペア:

[(1, 20449780), (2, 10224890), (4, 5112445), (5, 4089956), (10, 2044978), (13, 1573060), (20, 1022489), (26, 786530), (52, 393265), (65, 314612), (130, 157306), (260, 78653)]