19959745

素因数分解:

$5^1\times {\mathrm{13}}^3\times {\mathrm{23}}^1\times {\mathrm{79}}^1$

素因数の和:146

約数の個数: 32

約数和(自身を含む): 27417600

約数和(自身を除く): 7457855

約数列:

[1, 5, 13, 23, 65, 79, 115, 169, 299, 395, 845, 1027, 1495, 1817, 2197, 3887, 5135, 9085, 10985, 13351, 19435, 23621, 50531, 66755, 118105, 173563, 252655, 307073, 867815, 1535365, 3991949, 19959745]

約数ペア:

[(1, 19959745), (5, 3991949), (13, 1535365), (23, 867815), (65, 307073), (79, 252655), (115, 173563), (169, 118105), (299, 66755), (395, 50531), (845, 23621), (1027, 19435), (1495, 13351), (1817, 10985), (2197, 9085), (3887, 5135)]