21435620

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{26141}}^1$

素因数の和:26191

約数の個数: 24

約数和(自身を含む): 46114488

約数和(自身を除く): 24678868

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 26141, 52282, 104564, 130705, 261410, 522820, 1071781, 2143562, 4287124, 5358905, 10717810, 21435620]

約数ペア:

[(1, 21435620), (2, 10717810), (4, 5358905), (5, 4287124), (10, 2143562), (20, 1071781), (41, 522820), (82, 261410), (164, 130705), (205, 104564), (410, 52282), (820, 26141)]