20897906

素因数分解:

$2^1\times {\mathrm{31}}^2\times {\mathrm{83}}^1\times {\mathrm{131}}^1$

素因数の和:278

約数の個数: 24

約数和(自身を含む): 33031152

約数和(自身を除く): 12133246

約数列:

[1, 2, 31, 62, 83, 131, 166, 262, 961, 1922, 2573, 4061, 5146, 8122, 10873, 21746, 79763, 125891, 159526, 251782, 337063, 674126, 10448953, 20897906]

約数ペア:

[(1, 20897906), (2, 10448953), (31, 674126), (62, 337063), (83, 251782), (131, 159526), (166, 125891), (262, 79763), (961, 21746), (1922, 10873), (2573, 8122), (4061, 5146)]