21808885

素因数分解:

$5^1\times 7^1\times {\mathrm{197}}^1\times {\mathrm{3163}}^1$

素因数の和:3372

約数の個数: 16

約数和(自身を含む): 30070656

約数和(自身を除く): 8261771

約数列:

[1, 5, 7, 35, 197, 985, 1379, 3163, 6895, 15815, 22141, 110705, 623111, 3115555, 4361777, 21808885]

約数ペア:

[(1, 21808885), (5, 4361777), (7, 3115555), (35, 623111), (197, 110705), (985, 22141), (1379, 15815), (3163, 6895)]