20478879

素因数分解:

$3^3\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{569}}^1$

素因数の和:652

約数の個数: 32

約数和(自身を含む): 32102400

約数和(自身を除く): 11623521

約数列:

[1, 3, 9, 27, 31, 43, 93, 129, 279, 387, 569, 837, 1161, 1333, 1707, 3999, 5121, 11997, 15363, 17639, 24467, 35991, 52917, 73401, 158751, 220203, 476253, 660609, 758477, 2275431, 6826293, 20478879]

約数ペア:

[(1, 20478879), (3, 6826293), (9, 2275431), (27, 758477), (31, 660609), (43, 476253), (93, 220203), (129, 158751), (279, 73401), (387, 52917), (569, 35991), (837, 24467), (1161, 17639), (1333, 15363), (1707, 11997), (3999, 5121)]