20687128

素因数分解:

$2^3\times 7^1\times {\mathrm{11}}^2\times {\mathrm{43}}^1\times {\mathrm{71}}^1$

素因数の和:149

約数の個数: 96

約数和(自身を含む): 50561280

約数和(自身を除く): 29874152

約数列:

[1, 2, 4, 7, 8, 11, 14, 22, 28, 43, 44, 56, 71, 77, 86, 88, 121, 142, 154, 172, 242, 284, 301, 308, 344, 473, 484, 497, 568, 602, 616, 781, 847, 946, 968, 994, 1204, 1562, 1694, 1892, 1988, 2408, 3053, 3124, 3311, 3388, 3784, 3976, 5203, 5467, 6106, 6248, 6622, 6776, 8591, 10406, 10934, 12212, 13244, 17182, 20812, 21371, 21868, 24424, 26488, 33583, 34364, 36421, 41624, 42742, 43736, 60137, 67166, 68728, 72842, 85484, 120274, 134332, 145684, 170968, 235081, 240548, 268664, 291368, 369413, 470162, 481096, 738826, 940324, 1477652, 1880648, 2585891, 2955304, 5171782, 10343564, 20687128]

約数ペア:

[(1, 20687128), (2, 10343564), (4, 5171782), (7, 2955304), (8, 2585891), (11, 1880648), (14, 1477652), (22, 940324), (28, 738826), (43, 481096), (44, 470162), (56, 369413), (71, 291368), (77, 268664), (86, 240548), (88, 235081), (121, 170968), (142, 145684), (154, 134332), (172, 120274), (242, 85484), (284, 72842), (301, 68728), (308, 67166), (344, 60137), (473, 43736), (484, 42742), (497, 41624), (568, 36421), (602, 34364), (616, 33583), (781, 26488), (847, 24424), (946, 21868), (968, 21371), (994, 20812), (1204, 17182), (1562, 13244), (1694, 12212), (1892, 10934), (1988, 10406), (2408, 8591), (3053, 6776), (3124, 6622), (3311, 6248), (3388, 6106), (3784, 5467), (3976, 5203)]