18991805

素因数分解:

$5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{59}}^1\times {\mathrm{541}}^1$

素因数の和:629

約数の個数: 32

約数和(自身を含む): 28097280

約数和(自身を除く): 9105475

約数列:

[1, 5, 7, 17, 35, 59, 85, 119, 295, 413, 541, 595, 1003, 2065, 2705, 3787, 5015, 7021, 9197, 18935, 31919, 35105, 45985, 64379, 159595, 223433, 321895, 542623, 1117165, 2713115, 3798361, 18991805]

約数ペア:

[(1, 18991805), (5, 3798361), (7, 2713115), (17, 1117165), (35, 542623), (59, 321895), (85, 223433), (119, 159595), (295, 64379), (413, 45985), (541, 35105), (595, 31919), (1003, 18935), (2065, 9197), (2705, 7021), (3787, 5015)]