21071806

素因数分解:

$2^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1$

素因数の和:169

約数の個数: 64

約数和(自身を含む): 41057280

約数和(自身を除く): 19985474

約数列:

[1, 2, 7, 14, 17, 29, 34, 43, 58, 71, 86, 119, 142, 203, 238, 301, 406, 493, 497, 602, 731, 986, 994, 1207, 1247, 1462, 2059, 2414, 2494, 3053, 3451, 4118, 5117, 6106, 6902, 8449, 8729, 10234, 14413, 16898, 17458, 21199, 21371, 28826, 35003, 42398, 42742, 51901, 70006, 88537, 103802, 148393, 177074, 245021, 296786, 363307, 490042, 619759, 726614, 1239518, 1505129, 3010258, 10535903, 21071806]

約数ペア:

[(1, 21071806), (2, 10535903), (7, 3010258), (14, 1505129), (17, 1239518), (29, 726614), (34, 619759), (43, 490042), (58, 363307), (71, 296786), (86, 245021), (119, 177074), (142, 148393), (203, 103802), (238, 88537), (301, 70006), (406, 51901), (493, 42742), (497, 42398), (602, 35003), (731, 28826), (986, 21371), (994, 21199), (1207, 17458), (1247, 16898), (1462, 14413), (2059, 10234), (2414, 8729), (2494, 8449), (3053, 6902), (3451, 6106), (4118, 5117)]