20611556

素因数分解:

$2^2\times 7^3\times {\mathrm{83}}^1\times {\mathrm{181}}^1$

素因数の和:289

約数の個数: 48

約数和(自身を含む): 42806400

約数和(自身を除く): 22194844

約数列:

[1, 2, 4, 7, 14, 28, 49, 83, 98, 166, 181, 196, 332, 343, 362, 581, 686, 724, 1162, 1267, 1372, 2324, 2534, 4067, 5068, 8134, 8869, 15023, 16268, 17738, 28469, 30046, 35476, 56938, 60092, 62083, 105161, 113876, 124166, 210322, 248332, 420644, 736127, 1472254, 2944508, 5152889, 10305778, 20611556]

約数ペア:

[(1, 20611556), (2, 10305778), (4, 5152889), (7, 2944508), (14, 1472254), (28, 736127), (49, 420644), (83, 248332), (98, 210322), (166, 124166), (181, 113876), (196, 105161), (332, 62083), (343, 60092), (362, 56938), (581, 35476), (686, 30046), (724, 28469), (1162, 17738), (1267, 16268), (1372, 15023), (2324, 8869), (2534, 8134), (4067, 5068)]