21905649

素因数分解:

$3^2\times {\mathrm{61}}^1\times {\mathrm{39901}}^1$

素因数の和:39968

約数の個数: 12

約数和(自身を含む): 32161012

約数和(自身を除く): 10255363

約数列:

[1, 3, 9, 61, 183, 549, 39901, 119703, 359109, 2433961, 7301883, 21905649]

約数ペア:

[(1, 21905649), (3, 7301883), (9, 2433961), (61, 359109), (183, 119703), (549, 39901)]