398905

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^2$

素因数の和:73

約数の個数: 24

約数和(自身を含む): 576072

約数和(自身を除く): 177167

約数列:

[1, 5, 13, 17, 19, 65, 85, 95, 221, 247, 323, 361, 1105, 1235, 1615, 1805, 4199, 4693, 6137, 20995, 23465, 30685, 79781, 398905]

約数ペア:

[(1, 398905), (5, 79781), (13, 30685), (17, 23465), (19, 20995), (65, 6137), (85, 4693), (95, 4199), (221, 1805), (247, 1615), (323, 1235), (361, 1105)]