21138616

素因数分解:

$2^3\times {\mathrm{17}}^2\times {\mathrm{41}}^1\times {\mathrm{223}}^1$

素因数の和:304

約数の個数: 48

約数和(自身を含む): 43323840

約数和(自身を除く): 22185224

約数列:

[1, 2, 4, 8, 17, 34, 41, 68, 82, 136, 164, 223, 289, 328, 446, 578, 697, 892, 1156, 1394, 1784, 2312, 2788, 3791, 5576, 7582, 9143, 11849, 15164, 18286, 23698, 30328, 36572, 47396, 64447, 73144, 94792, 128894, 155431, 257788, 310862, 515576, 621724, 1243448, 2642327, 5284654, 10569308, 21138616]

約数ペア:

[(1, 21138616), (2, 10569308), (4, 5284654), (8, 2642327), (17, 1243448), (34, 621724), (41, 515576), (68, 310862), (82, 257788), (136, 155431), (164, 128894), (223, 94792), (289, 73144), (328, 64447), (446, 47396), (578, 36572), (697, 30328), (892, 23698), (1156, 18286), (1394, 15164), (1784, 11849), (2312, 9143), (2788, 7582), (3791, 5576)]