20899905

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{5641}}^1$

素因数の和:5681

約数の個数: 32

約数和(自身を含む): 37914240

約数和(自身を除く): 17014335

約数列:

[1, 3, 5, 13, 15, 19, 39, 57, 65, 95, 195, 247, 285, 741, 1235, 3705, 5641, 16923, 28205, 73333, 84615, 107179, 219999, 321537, 366665, 535895, 1099995, 1393327, 1607685, 4179981, 6966635, 20899905]

約数ペア:

[(1, 20899905), (3, 6966635), (5, 4179981), (13, 1607685), (15, 1393327), (19, 1099995), (39, 535895), (57, 366665), (65, 321537), (95, 219999), (195, 107179), (247, 84615), (285, 73333), (741, 28205), (1235, 16923), (3705, 5641)]