21207428

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{43}}^1\times {\mathrm{1019}}^1$

素因数の和:1088

約数の個数: 36

約数和(自身を含む): 41783280

約数和(自身を除く): 20575852

約数列:

[1, 2, 4, 11, 22, 43, 44, 86, 121, 172, 242, 473, 484, 946, 1019, 1892, 2038, 4076, 5203, 10406, 11209, 20812, 22418, 43817, 44836, 87634, 123299, 175268, 246598, 481987, 493196, 963974, 1927948, 5301857, 10603714, 21207428]

約数ペア:

[(1, 21207428), (2, 10603714), (4, 5301857), (11, 1927948), (22, 963974), (43, 493196), (44, 481987), (86, 246598), (121, 175268), (172, 123299), (242, 87634), (473, 44836), (484, 43817), (946, 22418), (1019, 20812), (1892, 11209), (2038, 10406), (4076, 5203)]