20407743

素因数分解:

$3^2\times {\mathrm{71}}^1\times {\mathrm{109}}^1\times {\mathrm{293}}^1$

素因数の和:479

約数の個数: 24

約数和(自身を含む): 30270240

約数和(自身を除く): 9862497

約数列:

[1, 3, 9, 71, 109, 213, 293, 327, 639, 879, 981, 2637, 7739, 20803, 23217, 31937, 62409, 69651, 95811, 187227, 287433, 2267527, 6802581, 20407743]

約数ペア:

[(1, 20407743), (3, 6802581), (9, 2267527), (71, 287433), (109, 187227), (213, 95811), (293, 69651), (327, 62409), (639, 31937), (879, 23217), (981, 20803), (2637, 7739)]