19904708

素因数分解:

$2^2\times {\mathrm{71}}^1\times {\mathrm{109}}^1\times {\mathrm{643}}^1$

素因数の和:827

約数の個数: 24

約数和(自身を含む): 35703360

約数和(自身を除く): 15798652

約数列:

[1, 2, 4, 71, 109, 142, 218, 284, 436, 643, 1286, 2572, 7739, 15478, 30956, 45653, 70087, 91306, 140174, 182612, 280348, 4976177, 9952354, 19904708]

約数ペア:

[(1, 19904708), (2, 9952354), (4, 4976177), (71, 280348), (109, 182612), (142, 140174), (218, 91306), (284, 70087), (436, 45653), (643, 30956), (1286, 15478), (2572, 7739)]