21820539

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{4271}}^1$

素因数の和:4418

約数の個数: 16

約数和(自身を含む): 31578624

約数和(自身を除く): 9758085

約数列:

[1, 3, 13, 39, 131, 393, 1703, 4271, 5109, 12813, 55523, 166569, 559501, 1678503, 7273513, 21820539]

約数ペア:

[(1, 21820539), (3, 7273513), (13, 1678503), (39, 559501), (131, 166569), (393, 55523), (1703, 12813), (4271, 5109)]