15990320

素因数分解:

$2^4\times 5^1\times {\mathrm{101}}^1\times {\mathrm{1979}}^1$

素因数の和:2093

約数の個数: 40

約数和(自身を含む): 37564560

約数和(自身を除く): 21574240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 101, 202, 404, 505, 808, 1010, 1616, 1979, 2020, 3958, 4040, 7916, 8080, 9895, 15832, 19790, 31664, 39580, 79160, 158320, 199879, 399758, 799516, 999395, 1599032, 1998790, 3198064, 3997580, 7995160, 15990320]

約数ペア:

[(1, 15990320), (2, 7995160), (4, 3997580), (5, 3198064), (8, 1998790), (10, 1599032), (16, 999395), (20, 799516), (40, 399758), (80, 199879), (101, 158320), (202, 79160), (404, 39580), (505, 31664), (808, 19790), (1010, 15832), (1616, 9895), (1979, 8080), (2020, 7916), (3958, 4040)]