20891013

素因数分解:

$3^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{233}}^1$

素因数の和:290

約数の個数: 48

約数和(自身を含む): 34856640

約数和(自身を除く): 13965627

約数列:

[1, 3, 11, 13, 19, 33, 39, 57, 121, 143, 209, 233, 247, 363, 429, 627, 699, 741, 1573, 2299, 2563, 2717, 3029, 4427, 4719, 6897, 7689, 8151, 9087, 13281, 28193, 29887, 33319, 48697, 57551, 84579, 89661, 99957, 146091, 172653, 366509, 535667, 633061, 1099527, 1607001, 1899183, 6963671, 20891013]

約数ペア:

[(1, 20891013), (3, 6963671), (11, 1899183), (13, 1607001), (19, 1099527), (33, 633061), (39, 535667), (57, 366509), (121, 172653), (143, 146091), (209, 99957), (233, 89661), (247, 84579), (363, 57551), (429, 48697), (627, 33319), (699, 29887), (741, 28193), (1573, 13281), (2299, 9087), (2563, 8151), (2717, 7689), (3029, 6897), (4427, 4719)]