20709905

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{277}}^1\times {\mathrm{787}}^1$

素因数の和:1088

約数の個数: 16

約数和(自身を含む): 26287680

約数和(自身を除く): 5577775

約数列:

[1, 5, 19, 95, 277, 787, 1385, 3935, 5263, 14953, 26315, 74765, 217999, 1089995, 4141981, 20709905]

約数ペア:

[(1, 20709905), (5, 4141981), (19, 1089995), (95, 217999), (277, 74765), (787, 26315), (1385, 14953), (3935, 5263)]