21989973

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{317}}^1\times {\mathrm{1217}}^1$

素因数の和:1556

約数の個数: 16

約数和(自身を含む): 30985920

約数和(自身を除く): 8995947

約数列:

[1, 3, 19, 57, 317, 951, 1217, 3651, 6023, 18069, 23123, 69369, 385789, 1157367, 7329991, 21989973]

約数ペア:

[(1, 21989973), (3, 7329991), (19, 1157367), (57, 385789), (317, 69369), (951, 23123), (1217, 18069), (3651, 6023)]