21579155

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{101}}^1\times {\mathrm{173}}^1$

素因数の和:311

約数の個数: 32

約数和(自身を含む): 29816640

約数和(自身を除く): 8237485

約数列:

[1, 5, 13, 19, 65, 95, 101, 173, 247, 505, 865, 1235, 1313, 1919, 2249, 3287, 6565, 9595, 11245, 16435, 17473, 24947, 42731, 87365, 124735, 213655, 227149, 331987, 1135745, 1659935, 4315831, 21579155]

約数ペア:

[(1, 21579155), (5, 4315831), (13, 1659935), (19, 1135745), (65, 331987), (95, 227149), (101, 213655), (173, 124735), (247, 87365), (505, 42731), (865, 24947), (1235, 17473), (1313, 16435), (1919, 11245), (2249, 9595), (3287, 6565)]