21031472

素因数分解:

$2^4\times 7^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{397}}^1$

素因数の和:466

約数の個数: 80

約数和(自身を含む): 52115712

約数和(自身を除く): 31084240

約数列:

[1, 2, 4, 7, 8, 11, 14, 16, 22, 28, 43, 44, 56, 77, 86, 88, 112, 154, 172, 176, 301, 308, 344, 397, 473, 602, 616, 688, 794, 946, 1204, 1232, 1588, 1892, 2408, 2779, 3176, 3311, 3784, 4367, 4816, 5558, 6352, 6622, 7568, 8734, 11116, 13244, 17071, 17468, 22232, 26488, 30569, 34142, 34936, 44464, 52976, 61138, 68284, 69872, 119497, 122276, 136568, 187781, 238994, 244552, 273136, 375562, 477988, 489104, 751124, 955976, 1314467, 1502248, 1911952, 2628934, 3004496, 5257868, 10515736, 21031472]

約数ペア:

[(1, 21031472), (2, 10515736), (4, 5257868), (7, 3004496), (8, 2628934), (11, 1911952), (14, 1502248), (16, 1314467), (22, 955976), (28, 751124), (43, 489104), (44, 477988), (56, 375562), (77, 273136), (86, 244552), (88, 238994), (112, 187781), (154, 136568), (172, 122276), (176, 119497), (301, 69872), (308, 68284), (344, 61138), (397, 52976), (473, 44464), (602, 34936), (616, 34142), (688, 30569), (794, 26488), (946, 22232), (1204, 17468), (1232, 17071), (1588, 13244), (1892, 11116), (2408, 8734), (2779, 7568), (3176, 6622), (3311, 6352), (3784, 5558), (4367, 4816)]