18393905

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{307}}^1\times {\mathrm{521}}^1$

素因数の和:856

約数の個数: 16

約数和(自身を含む): 23151744

約数和(自身を除く): 4757839

約数列:

[1, 5, 23, 115, 307, 521, 1535, 2605, 7061, 11983, 35305, 59915, 159947, 799735, 3678781, 18393905]

約数ペア:

[(1, 18393905), (5, 3678781), (23, 799735), (115, 159947), (307, 59915), (521, 35305), (1535, 11983), (2605, 7061)]