18720429

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{1459}}^1$

素因数の和:1529

約数の個数: 32

約数和(自身を含む): 31395840

約数和(自身を除く): 12675411

約数列:

[1, 3, 7, 13, 21, 39, 47, 91, 141, 273, 329, 611, 987, 1459, 1833, 4277, 4377, 10213, 12831, 18967, 30639, 56901, 68573, 132769, 205719, 398307, 480011, 891449, 1440033, 2674347, 6240143, 18720429]

約数ペア:

[(1, 18720429), (3, 6240143), (7, 2674347), (13, 1440033), (21, 891449), (39, 480011), (47, 398307), (91, 205719), (141, 132769), (273, 68573), (329, 56901), (611, 30639), (987, 18967), (1459, 12831), (1833, 10213), (4277, 4377)]