21186879

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^2\times {\mathrm{3491}}^1$

素因数の和:3535

約数の個数: 24

約数和(自身を含む): 34305408

約数和(自身を除く): 13118529

約数列:

[1, 3, 7, 17, 21, 51, 119, 289, 357, 867, 2023, 3491, 6069, 10473, 24437, 59347, 73311, 178041, 415429, 1008899, 1246287, 3026697, 7062293, 21186879]

約数ペア:

[(1, 21186879), (3, 7062293), (7, 3026697), (17, 1246287), (21, 1008899), (51, 415429), (119, 178041), (289, 73311), (357, 59347), (867, 24437), (2023, 10473), (3491, 6069)]