21017256

素因数分解:

$2^3\times 3^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{53}}^1$

素因数の和:147

約数の個数: 128

約数和(自身を含む): 60963840

約数和(自身を除く): 39946584

約数列:

[1, 2, 3, 4, 6, 8, 12, 13, 24, 26, 31, 39, 41, 52, 53, 62, 78, 82, 93, 104, 106, 123, 124, 156, 159, 164, 186, 212, 246, 248, 312, 318, 328, 372, 403, 424, 492, 533, 636, 689, 744, 806, 984, 1066, 1209, 1271, 1272, 1378, 1599, 1612, 1643, 2067, 2132, 2173, 2418, 2542, 2756, 3198, 3224, 3286, 3813, 4134, 4264, 4346, 4836, 4929, 5084, 5512, 6396, 6519, 6572, 7626, 8268, 8692, 9672, 9858, 10168, 12792, 13038, 13144, 15252, 16523, 16536, 17384, 19716, 21359, 26076, 28249, 30504, 33046, 39432, 42718, 49569, 52152, 56498, 64077, 66092, 67363, 84747, 85436, 99138, 112996, 128154, 132184, 134726, 169494, 170872, 198276, 202089, 225992, 256308, 269452, 338988, 396552, 404178, 512616, 538904, 677976, 808356, 875719, 1616712, 1751438, 2627157, 3502876, 5254314, 7005752, 10508628, 21017256]

約数ペア:

[(1, 21017256), (2, 10508628), (3, 7005752), (4, 5254314), (6, 3502876), (8, 2627157), (12, 1751438), (13, 1616712), (24, 875719), (26, 808356), (31, 677976), (39, 538904), (41, 512616), (52, 404178), (53, 396552), (62, 338988), (78, 269452), (82, 256308), (93, 225992), (104, 202089), (106, 198276), (123, 170872), (124, 169494), (156, 134726), (159, 132184), (164, 128154), (186, 112996), (212, 99138), (246, 85436), (248, 84747), (312, 67363), (318, 66092), (328, 64077), (372, 56498), (403, 52152), (424, 49569), (492, 42718), (533, 39432), (636, 33046), (689, 30504), (744, 28249), (806, 26076), (984, 21359), (1066, 19716), (1209, 17384), (1271, 16536), (1272, 16523), (1378, 15252), (1599, 13144), (1612, 13038), (1643, 12792), (2067, 10168), (2132, 9858), (2173, 9672), (2418, 8692), (2542, 8268), (2756, 7626), (3198, 6572), (3224, 6519), (3286, 6396), (3813, 5512), (4134, 5084), (4264, 4929), (4346, 4836)]