20965.000000

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{199}}^1$

素因数の和:237

約数の個数: 40

約数和(自身を含む): 1488000

約数和(自身を除く): 822544

約数列:

[1, 2, 4, 8, 11, 16, 19, 22, 38, 44, 76, 88, 152, 176, 199, 209, 304, 398, 418, 796, 836, 1592, 1672, 2189, 3184, 3344, 3781, 4378, 7562, 8756, 15124, 17512, 30248, 35024, 41591, 60496, 83182, 166364, 332728, 665456]

約数ペア:

[(1, 665456), (2, 332728), (4, 166364), (8, 83182), (11, 60496), (16, 41591), (19, 35024), (22, 30248), (38, 17512), (44, 15124), (76, 8756), (88, 7562), (152, 4378), (176, 3781), (199, 3344), (209, 3184), (304, 2189), (398, 1672), (418, 1592), (796, 836)]