20690887

素因数分解:

$7^2\times {\mathrm{17}}^1\times {\mathrm{59}}^1\times {\mathrm{421}}^1$

素因数の和:511

約数の個数: 24

約数和(自身を含む): 25978320

約数和(自身を除く): 5287433

約数列:

[1, 7, 17, 49, 59, 119, 413, 421, 833, 1003, 2891, 2947, 7021, 7157, 20629, 24839, 49147, 50099, 173873, 350693, 422263, 1217111, 2955841, 20690887]

約数ペア:

[(1, 20690887), (7, 2955841), (17, 1217111), (49, 422263), (59, 350693), (119, 173873), (413, 50099), (421, 49147), (833, 24839), (1003, 20629), (2891, 7157), (2947, 7021)]