21082728

素因数分解:

$2^3\times 3^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{659}}^1$

素因数の和:742

約数の個数: 64

約数和(自身を含む): 55756800

約数和(自身を除く): 34674072

約数列:

[1, 2, 3, 4, 6, 8, 12, 24, 31, 43, 62, 86, 93, 124, 129, 172, 186, 248, 258, 344, 372, 516, 659, 744, 1032, 1318, 1333, 1977, 2636, 2666, 3954, 3999, 5272, 5332, 7908, 7998, 10664, 15816, 15996, 20429, 28337, 31992, 40858, 56674, 61287, 81716, 85011, 113348, 122574, 163432, 170022, 226696, 245148, 340044, 490296, 680088, 878447, 1756894, 2635341, 3513788, 5270682, 7027576, 10541364, 21082728]

約数ペア:

[(1, 21082728), (2, 10541364), (3, 7027576), (4, 5270682), (6, 3513788), (8, 2635341), (12, 1756894), (24, 878447), (31, 680088), (43, 490296), (62, 340044), (86, 245148), (93, 226696), (124, 170022), (129, 163432), (172, 122574), (186, 113348), (248, 85011), (258, 81716), (344, 61287), (372, 56674), (516, 40858), (659, 31992), (744, 28337), (1032, 20429), (1318, 15996), (1333, 15816), (1977, 10664), (2636, 7998), (2666, 7908), (3954, 5332), (3999, 5272)]