20891811

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{313}}^1\times {\mathrm{1171}}^1$

素因数の和:1506

約数の個数: 16

約数和(自身を含む): 29440640

約数和(自身を除く): 8548829

約数列:

[1, 3, 19, 57, 313, 939, 1171, 3513, 5947, 17841, 22249, 66747, 366523, 1099569, 6963937, 20891811]

約数ペア:

[(1, 20891811), (3, 6963937), (19, 1099569), (57, 366523), (313, 66747), (939, 22249), (1171, 17841), (3513, 5947)]