20581821

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{4091}}^1$

素因数の和:4153

約数の個数: 24

約数和(自身を含む): 32768736

約数和(自身を除く): 12186915

約数列:

[1, 3, 9, 13, 39, 43, 117, 129, 387, 559, 1677, 4091, 5031, 12273, 36819, 53183, 159549, 175913, 478647, 527739, 1583217, 2286869, 6860607, 20581821]

約数ペア:

[(1, 20581821), (3, 6860607), (9, 2286869), (13, 1583217), (39, 527739), (43, 478647), (117, 175913), (129, 159549), (387, 53183), (559, 36819), (1677, 12273), (4091, 5031)]