661808

素因数分解:

$2^4\times 7^1\times {\mathrm{19}}^1\times {\mathrm{311}}^1$

素因数の和:345

約数の個数: 40

約数和(自身を含む): 1547520

約数和(自身を除く): 885712

約数列:

[1, 2, 4, 7, 8, 14, 16, 19, 28, 38, 56, 76, 112, 133, 152, 266, 304, 311, 532, 622, 1064, 1244, 2128, 2177, 2488, 4354, 4976, 5909, 8708, 11818, 17416, 23636, 34832, 41363, 47272, 82726, 94544, 165452, 330904, 661808]

約数ペア:

[(1, 661808), (2, 330904), (4, 165452), (7, 94544), (8, 82726), (14, 47272), (16, 41363), (19, 34832), (28, 23636), (38, 17416), (56, 11818), (76, 8708), (112, 5909), (133, 4976), (152, 4354), (266, 2488), (304, 2177), (311, 2128), (532, 1244), (622, 1064)]