20505771

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{113}}^1$

素因数の和:193

約数の個数: 64

約数和(自身を含む): 36771840

約数和(自身を除く): 16266069

約数列:

[1, 3, 9, 11, 13, 27, 33, 39, 47, 99, 113, 117, 141, 143, 297, 339, 351, 423, 429, 517, 611, 1017, 1243, 1269, 1287, 1469, 1551, 1833, 3051, 3729, 3861, 4407, 4653, 5311, 5499, 6721, 11187, 13221, 13959, 15933, 16159, 16497, 20163, 33561, 39663, 47799, 48477, 58421, 60489, 69043, 143397, 145431, 175263, 181467, 207129, 436293, 525789, 621387, 759473, 1577367, 1864161, 2278419, 6835257, 20505771]

約数ペア:

[(1, 20505771), (3, 6835257), (9, 2278419), (11, 1864161), (13, 1577367), (27, 759473), (33, 621387), (39, 525789), (47, 436293), (99, 207129), (113, 181467), (117, 175263), (141, 145431), (143, 143397), (297, 69043), (339, 60489), (351, 58421), (423, 48477), (429, 47799), (517, 39663), (611, 33561), (1017, 20163), (1243, 16497), (1269, 16159), (1287, 15933), (1469, 13959), (1551, 13221), (1833, 11187), (3051, 6721), (3729, 5499), (3861, 5311), (4407, 4653)]