21128008

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{487}}^1$

素因数の和:550

約数の個数: 64

約数和(自身を含む): 47433600

約数和(自身を除く): 26305592

約数列:

[1, 2, 4, 8, 11, 17, 22, 29, 34, 44, 58, 68, 88, 116, 136, 187, 232, 319, 374, 487, 493, 638, 748, 974, 986, 1276, 1496, 1948, 1972, 2552, 3896, 3944, 5357, 5423, 8279, 10714, 10846, 14123, 16558, 21428, 21692, 28246, 33116, 42856, 43384, 56492, 66232, 91069, 112984, 155353, 182138, 240091, 310706, 364276, 480182, 621412, 728552, 960364, 1242824, 1920728, 2641001, 5282002, 10564004, 21128008]

約数ペア:

[(1, 21128008), (2, 10564004), (4, 5282002), (8, 2641001), (11, 1920728), (17, 1242824), (22, 960364), (29, 728552), (34, 621412), (44, 480182), (58, 364276), (68, 310706), (88, 240091), (116, 182138), (136, 155353), (187, 112984), (232, 91069), (319, 66232), (374, 56492), (487, 43384), (493, 42856), (638, 33116), (748, 28246), (974, 21692), (986, 21428), (1276, 16558), (1496, 14123), (1948, 10846), (1972, 10714), (2552, 8279), (3896, 5423), (3944, 5357)]