397487620

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{379}}^1\times {\mathrm{1279}}^1$

素因数の和:1708

約数の個数: 48

約数和(自身を含む): 858009600

約数和(自身を除く): 460521980

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 379, 410, 758, 820, 1279, 1516, 1895, 2558, 3790, 5116, 6395, 7580, 12790, 15539, 25580, 31078, 52439, 62156, 77695, 104878, 155390, 209756, 262195, 310780, 484741, 524390, 969482, 1048780, 1938964, 2423705, 4847410, 9694820, 19874381, 39748762, 79497524, 99371905, 198743810, 397487620]

約数ペア:

[(1, 397487620), (2, 198743810), (4, 99371905), (5, 79497524), (10, 39748762), (20, 19874381), (41, 9694820), (82, 4847410), (164, 2423705), (205, 1938964), (379, 1048780), (410, 969482), (758, 524390), (820, 484741), (1279, 310780), (1516, 262195), (1895, 209756), (2558, 155390), (3790, 104878), (5116, 77695), (6395, 62156), (7580, 52439), (12790, 31078), (15539, 25580)]