20521615

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{337}}^1\times {\mathrm{641}}^1$

素因数の和:1002

約数の個数: 16

約数和(自身を含む): 26039520

約数和(自身を除く): 5517905

約数列:

[1, 5, 19, 95, 337, 641, 1685, 3205, 6403, 12179, 32015, 60895, 216017, 1080085, 4104323, 20521615]

約数ペア:

[(1, 20521615), (5, 4104323), (19, 1080085), (95, 216017), (337, 60895), (641, 32015), (1685, 12179), (3205, 6403)]