21661311

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{233}}^2$

素因数の和:495

約数の個数: 24

約数和(自身を含む): 34894720

約数和(自身を除く): 13233409

約数列:

[1, 3, 7, 19, 21, 57, 133, 233, 399, 699, 1631, 4427, 4893, 13281, 30989, 54289, 92967, 162867, 380023, 1031491, 1140069, 3094473, 7220437, 21661311]

約数ペア:

[(1, 21661311), (3, 7220437), (7, 3094473), (19, 1140069), (21, 1031491), (57, 380023), (133, 162867), (233, 92967), (399, 54289), (699, 30989), (1631, 13281), (4427, 4893)]