21817985

素因数分解:

$5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{109}}^1$

素因数の和:190

約数の個数: 48

約数和(自身を含む): 33105600

約数和(自身を除く): 11287615

約数列:

[1, 5, 7, 19, 35, 43, 49, 95, 109, 133, 215, 245, 301, 545, 665, 763, 817, 931, 1505, 2071, 2107, 3815, 4085, 4655, 4687, 5341, 5719, 10355, 10535, 14497, 23435, 26705, 28595, 32809, 40033, 72485, 89053, 101479, 164045, 200165, 229663, 445265, 507395, 623371, 1148315, 3116855, 4363597, 21817985]

約数ペア:

[(1, 21817985), (5, 4363597), (7, 3116855), (19, 1148315), (35, 623371), (43, 507395), (49, 445265), (95, 229663), (109, 200165), (133, 164045), (215, 101479), (245, 89053), (301, 72485), (545, 40033), (665, 32809), (763, 28595), (817, 26705), (931, 23435), (1505, 14497), (2071, 10535), (2107, 10355), (3815, 5719), (4085, 5341), (4655, 4687)]