20987546

素因数分解:

$2^1\times {\mathrm{23}}^2\times {\mathrm{83}}^1\times {\mathrm{239}}^1$

素因数の和:370

約数の個数: 24

約数和(自身を含む): 33445440

約数和(自身を除く): 12457894

約数列:

[1, 2, 23, 46, 83, 166, 239, 478, 529, 1058, 1909, 3818, 5497, 10994, 19837, 39674, 43907, 87814, 126431, 252862, 456251, 912502, 10493773, 20987546]

約数ペア:

[(1, 20987546), (2, 10493773), (23, 912502), (46, 456251), (83, 252862), (166, 126431), (239, 87814), (478, 43907), (529, 39674), (1058, 19837), (1909, 10994), (3818, 5497)]