21241328

素因数分解:

$2^4\times {\mathrm{23}}^1\times {\mathrm{197}}^1\times {\mathrm{293}}^1$

素因数の和:521

約数の個数: 40

約数和(自身を含む): 43309728

約数和(自身を除く): 22068400

約数列:

[1, 2, 4, 8, 16, 23, 46, 92, 184, 197, 293, 368, 394, 586, 788, 1172, 1576, 2344, 3152, 4531, 4688, 6739, 9062, 13478, 18124, 26956, 36248, 53912, 57721, 72496, 107824, 115442, 230884, 461768, 923536, 1327583, 2655166, 5310332, 10620664, 21241328]

約数ペア:

[(1, 21241328), (2, 10620664), (4, 5310332), (8, 2655166), (16, 1327583), (23, 923536), (46, 461768), (92, 230884), (184, 115442), (197, 107824), (293, 72496), (368, 57721), (394, 53912), (586, 36248), (788, 26956), (1172, 18124), (1576, 13478), (2344, 9062), (3152, 6739), (4531, 4688)]