21487788

素因数分解:

$2^2\times 3^3\times 7^1\times {\mathrm{43}}^1\times {\mathrm{661}}^1$

素因数の和:724

約数の個数: 96

約数和(自身を含む): 65246720

約数和(自身を除く): 43758932

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 27, 28, 36, 42, 43, 54, 63, 84, 86, 108, 126, 129, 172, 189, 252, 258, 301, 378, 387, 516, 602, 661, 756, 774, 903, 1161, 1204, 1322, 1548, 1806, 1983, 2322, 2644, 2709, 3612, 3966, 4627, 4644, 5418, 5949, 7932, 8127, 9254, 10836, 11898, 13881, 16254, 17847, 18508, 23796, 27762, 28423, 32508, 35694, 41643, 55524, 56846, 71388, 83286, 85269, 113692, 124929, 166572, 170538, 198961, 249858, 255807, 341076, 397922, 499716, 511614, 596883, 767421, 795844, 1023228, 1193766, 1534842, 1790649, 2387532, 3069684, 3581298, 5371947, 7162596, 10743894, 21487788]

約数ペア:

[(1, 21487788), (2, 10743894), (3, 7162596), (4, 5371947), (6, 3581298), (7, 3069684), (9, 2387532), (12, 1790649), (14, 1534842), (18, 1193766), (21, 1023228), (27, 795844), (28, 767421), (36, 596883), (42, 511614), (43, 499716), (54, 397922), (63, 341076), (84, 255807), (86, 249858), (108, 198961), (126, 170538), (129, 166572), (172, 124929), (189, 113692), (252, 85269), (258, 83286), (301, 71388), (378, 56846), (387, 55524), (516, 41643), (602, 35694), (661, 32508), (756, 28423), (774, 27762), (903, 23796), (1161, 18508), (1204, 17847), (1322, 16254), (1548, 13881), (1806, 11898), (1983, 10836), (2322, 9254), (2644, 8127), (2709, 7932), (3612, 5949), (3966, 5418), (4627, 4644)]