20930455

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{293}}^1$

素因数の和:475

約数の個数: 32

約数和(自身を含む): 31215744

約数和(自身を除く): 10285289

約数列:

[1, 5, 7, 13, 35, 65, 91, 157, 293, 455, 785, 1099, 1465, 2041, 2051, 3809, 5495, 10205, 10255, 14287, 19045, 26663, 46001, 71435, 133315, 230005, 322007, 598013, 1610035, 2990065, 4186091, 20930455]

約数ペア:

[(1, 20930455), (5, 4186091), (7, 2990065), (13, 1610035), (35, 598013), (65, 322007), (91, 230005), (157, 133315), (293, 71435), (455, 46001), (785, 26663), (1099, 19045), (1465, 14287), (2041, 10255), (2051, 10205), (3809, 5495)]