19781336

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{145451}}^1$

素因数の和:145474

約数の個数: 16

約数和(自身を含む): 39272040

約数和(自身を除く): 19490704

約数列:

[1, 2, 4, 8, 17, 34, 68, 136, 145451, 290902, 581804, 1163608, 2472667, 4945334, 9890668, 19781336]

約数ペア:

[(1, 19781336), (2, 9890668), (4, 4945334), (8, 2472667), (17, 1163608), (34, 581804), (68, 290902), (136, 145451)]