21039384

素因数分解:

$2^3\times 3^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1$

素因数の和:137

約数の個数: 128

約数和(自身を含む): 60192000

約数和(自身を除く): 39152616

約数列:

[1, 2, 3, 4, 6, 8, 12, 19, 24, 29, 37, 38, 43, 57, 58, 74, 76, 86, 87, 111, 114, 116, 129, 148, 152, 172, 174, 222, 228, 232, 258, 296, 344, 348, 444, 456, 516, 551, 696, 703, 817, 888, 1032, 1073, 1102, 1247, 1406, 1591, 1634, 1653, 2109, 2146, 2204, 2451, 2494, 2812, 3182, 3219, 3268, 3306, 3741, 4218, 4292, 4408, 4773, 4902, 4988, 5624, 6364, 6438, 6536, 6612, 7482, 8436, 8584, 9546, 9804, 9976, 12728, 12876, 13224, 14964, 16872, 19092, 19608, 20387, 23693, 25752, 29928, 30229, 38184, 40774, 46139, 47386, 60458, 61161, 71079, 81548, 90687, 92278, 94772, 120916, 122322, 138417, 142158, 163096, 181374, 184556, 189544, 241832, 244644, 276834, 284316, 362748, 369112, 489288, 553668, 568632, 725496, 876641, 1107336, 1753282, 2629923, 3506564, 5259846, 7013128, 10519692, 21039384]

約数ペア:

[(1, 21039384), (2, 10519692), (3, 7013128), (4, 5259846), (6, 3506564), (8, 2629923), (12, 1753282), (19, 1107336), (24, 876641), (29, 725496), (37, 568632), (38, 553668), (43, 489288), (57, 369112), (58, 362748), (74, 284316), (76, 276834), (86, 244644), (87, 241832), (111, 189544), (114, 184556), (116, 181374), (129, 163096), (148, 142158), (152, 138417), (172, 122322), (174, 120916), (222, 94772), (228, 92278), (232, 90687), (258, 81548), (296, 71079), (344, 61161), (348, 60458), (444, 47386), (456, 46139), (516, 40774), (551, 38184), (696, 30229), (703, 29928), (817, 25752), (888, 23693), (1032, 20387), (1073, 19608), (1102, 19092), (1247, 16872), (1406, 14964), (1591, 13224), (1634, 12876), (1653, 12728), (2109, 9976), (2146, 9804), (2204, 9546), (2451, 8584), (2494, 8436), (2812, 7482), (3182, 6612), (3219, 6536), (3268, 6438), (3306, 6364), (3741, 5624), (4218, 4988), (4292, 4902), (4408, 4773)]