19980155

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{149}}^1\times {\mathrm{2063}}^1$

素因数の和:2230

約数の個数: 16

約数和(自身を含む): 26006400

約数和(自身を除く): 6026245

約数列:

[1, 5, 13, 65, 149, 745, 1937, 2063, 9685, 10315, 26819, 134095, 307387, 1536935, 3996031, 19980155]

約数ペア:

[(1, 19980155), (5, 3996031), (13, 1536935), (65, 307387), (149, 134095), (745, 26819), (1937, 10315), (2063, 9685)]