21353991

素因数分解:

$3^1\times {\mathrm{83}}^1\times {\mathrm{191}}^1\times {\mathrm{449}}^1$

素因数の和:726

約数の個数: 16

約数和(自身を含む): 29030400

約数和(自身を除く): 7676409

約数列:

[1, 3, 83, 191, 249, 449, 573, 1347, 15853, 37267, 47559, 85759, 111801, 257277, 7117997, 21353991]

約数ペア:

[(1, 21353991), (3, 7117997), (83, 257277), (191, 111801), (249, 85759), (449, 47559), (573, 37267), (1347, 15853)]