21390593

素因数分解:

$7^1\times {\mathrm{47}}^1\times {\mathrm{79}}^1\times {\mathrm{823}}^1$

素因数の和:956

約数の個数: 16

約数和(自身を含む): 25313280

約数和(自身を除く): 3922687

約数列:

[1, 7, 47, 79, 329, 553, 823, 3713, 5761, 25991, 38681, 65017, 270767, 455119, 3055799, 21390593]

約数ペア:

[(1, 21390593), (7, 3055799), (47, 455119), (79, 270767), (329, 65017), (553, 38681), (823, 25991), (3713, 5761)]