21499312

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{31249}}^1$

素因数の和:31300

約数の個数: 20

約数和(自身を含む): 42625000

約数和(自身を除く): 21125688

約数列:

[1, 2, 4, 8, 16, 43, 86, 172, 344, 688, 31249, 62498, 124996, 249992, 499984, 1343707, 2687414, 5374828, 10749656, 21499312]

約数ペア:

[(1, 21499312), (2, 10749656), (4, 5374828), (8, 2687414), (16, 1343707), (43, 499984), (86, 249992), (172, 124996), (344, 62498), (688, 31249)]