20505231

素因数分解:

$3^4\times {\mathrm{149}}^1\times {\mathrm{1699}}^1$

素因数の和:1860

約数の個数: 20

約数和(自身を含む): 30855000

約数和(自身を除く): 10349769

約数列:

[1, 3, 9, 27, 81, 149, 447, 1341, 1699, 4023, 5097, 12069, 15291, 45873, 137619, 253151, 759453, 2278359, 6835077, 20505231]

約数ペア:

[(1, 20505231), (3, 6835077), (9, 2278359), (27, 759453), (81, 253151), (149, 137619), (447, 45873), (1341, 15291), (1699, 12069), (4023, 5097)]