18286760

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{71}}^1\times {\mathrm{137}}^1$

素因数の和:266

約数の個数: 64

約数和(自身を含む): 42923520

約数和(自身を除く): 24636760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 71, 94, 137, 142, 188, 235, 274, 284, 355, 376, 470, 548, 568, 685, 710, 940, 1096, 1370, 1420, 1880, 2740, 2840, 3337, 5480, 6439, 6674, 9727, 12878, 13348, 16685, 19454, 25756, 26696, 32195, 33370, 38908, 48635, 51512, 64390, 66740, 77816, 97270, 128780, 133480, 194540, 257560, 389080, 457169, 914338, 1828676, 2285845, 3657352, 4571690, 9143380, 18286760]

約数ペア:

[(1, 18286760), (2, 9143380), (4, 4571690), (5, 3657352), (8, 2285845), (10, 1828676), (20, 914338), (40, 457169), (47, 389080), (71, 257560), (94, 194540), (137, 133480), (142, 128780), (188, 97270), (235, 77816), (274, 66740), (284, 64390), (355, 51512), (376, 48635), (470, 38908), (548, 33370), (568, 32195), (685, 26696), (710, 25756), (940, 19454), (1096, 16685), (1370, 13348), (1420, 12878), (1880, 9727), (2740, 6674), (2840, 6439), (3337, 5480)]