18747531

素因数分解:

$3^4\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{397}}^1$

素因数の和:473

約数の個数: 40

約数和(自身を含む): 31206384

約数和(自身を除く): 12458853

約数列:

[1, 3, 9, 11, 27, 33, 53, 81, 99, 159, 297, 397, 477, 583, 891, 1191, 1431, 1749, 3573, 4293, 4367, 5247, 10719, 13101, 15741, 21041, 32157, 39303, 47223, 63123, 117909, 189369, 231451, 353727, 568107, 694353, 1704321, 2083059, 6249177, 18747531]

約数ペア:

[(1, 18747531), (3, 6249177), (9, 2083059), (11, 1704321), (27, 694353), (33, 568107), (53, 353727), (81, 231451), (99, 189369), (159, 117909), (297, 63123), (397, 47223), (477, 39303), (583, 32157), (891, 21041), (1191, 15741), (1431, 13101), (1749, 10719), (3573, 5247), (4293, 4367)]