15921997

素因数分解:

$7^1\times {\mathrm{13}}^2\times {\mathrm{43}}^1\times {\mathrm{313}}^1$

素因数の和:389

約数の個数: 24

約数和(自身を含む): 20226624

約数和(自身を除く): 4304627

約数列:

[1, 7, 13, 43, 91, 169, 301, 313, 559, 1183, 2191, 3913, 4069, 7267, 13459, 28483, 50869, 52897, 94213, 174967, 370279, 1224769, 2274571, 15921997]

約数ペア:

[(1, 15921997), (7, 2274571), (13, 1224769), (43, 370279), (91, 174967), (169, 94213), (301, 52897), (313, 50869), (559, 28483), (1183, 13459), (2191, 7267), (3913, 4069)]