19987352

素因数分解:

$2^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{457}}^1$

素因数の和:552

約数の個数: 64

約数和(自身を含む): 47485440

約数和(自身を除く): 27498088

約数列:

[1, 2, 4, 7, 8, 11, 14, 22, 28, 44, 56, 71, 77, 88, 142, 154, 284, 308, 457, 497, 568, 616, 781, 914, 994, 1562, 1828, 1988, 3124, 3199, 3656, 3976, 5027, 5467, 6248, 6398, 10054, 10934, 12796, 20108, 21868, 25592, 32447, 35189, 40216, 43736, 64894, 70378, 129788, 140756, 227129, 259576, 281512, 356917, 454258, 713834, 908516, 1427668, 1817032, 2498419, 2855336, 4996838, 9993676, 19987352]

約数ペア:

[(1, 19987352), (2, 9993676), (4, 4996838), (7, 2855336), (8, 2498419), (11, 1817032), (14, 1427668), (22, 908516), (28, 713834), (44, 454258), (56, 356917), (71, 281512), (77, 259576), (88, 227129), (142, 140756), (154, 129788), (284, 70378), (308, 64894), (457, 43736), (497, 40216), (568, 35189), (616, 32447), (781, 25592), (914, 21868), (994, 20108), (1562, 12796), (1828, 10934), (1988, 10054), (3124, 6398), (3199, 6248), (3656, 5467), (3976, 5027)]