20661543

素因数分解:

$3^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{263}}^1$

素因数の和:348

約数の個数: 48

約数和(自身を含む): 36241920

約数和(自身を除く): 15580377

約数列:

[1, 3, 7, 9, 21, 29, 43, 63, 87, 129, 203, 261, 263, 301, 387, 609, 789, 903, 1247, 1827, 1841, 2367, 2709, 3741, 5523, 7627, 8729, 11223, 11309, 16569, 22881, 26187, 33927, 53389, 68643, 78561, 79163, 101781, 160167, 237489, 327961, 480501, 712467, 983883, 2295727, 2951649, 6887181, 20661543]

約数ペア:

[(1, 20661543), (3, 6887181), (7, 2951649), (9, 2295727), (21, 983883), (29, 712467), (43, 480501), (63, 327961), (87, 237489), (129, 160167), (203, 101781), (261, 79163), (263, 78561), (301, 68643), (387, 53389), (609, 33927), (789, 26187), (903, 22881), (1247, 16569), (1827, 11309), (1841, 11223), (2367, 8729), (2709, 7627), (3741, 5523)]