21657245

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{277}}^1\times {\mathrm{823}}^1$

素因数の和:1124

約数の個数: 16

約数和(自身を含む): 27488640

約数和(自身を除く): 5831395

約数列:

[1, 5, 19, 95, 277, 823, 1385, 4115, 5263, 15637, 26315, 78185, 227971, 1139855, 4331449, 21657245]

約数ペア:

[(1, 21657245), (5, 4331449), (19, 1139855), (95, 227971), (277, 78185), (823, 26315), (1385, 15637), (4115, 5263)]