21604615

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{277}}^1\times {\mathrm{821}}^1$

素因数の和:1122

約数の個数: 16

約数和(自身を含む): 27421920

約数和(自身を除く): 5817305

約数列:

[1, 5, 19, 95, 277, 821, 1385, 4105, 5263, 15599, 26315, 77995, 227417, 1137085, 4320923, 21604615]

約数ペア:

[(1, 21604615), (5, 4320923), (19, 1137085), (95, 227417), (277, 77995), (821, 26315), (1385, 15599), (4105, 5263)]