21128016

素因数分解:

$2^4\times 3^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{691}}^1$

素因数の和:729

約数の個数: 120

約数和(自身を含む): 68474784

約数和(自身を除く): 47346768

約数列:

[1, 2, 3, 4, 6, 7, 8, 12, 13, 14, 16, 21, 24, 26, 28, 39, 42, 48, 49, 52, 56, 78, 84, 91, 98, 104, 112, 147, 156, 168, 182, 196, 208, 273, 294, 312, 336, 364, 392, 546, 588, 624, 637, 691, 728, 784, 1092, 1176, 1274, 1382, 1456, 1911, 2073, 2184, 2352, 2548, 2764, 3822, 4146, 4368, 4837, 5096, 5528, 7644, 8292, 8983, 9674, 10192, 11056, 14511, 15288, 16584, 17966, 19348, 26949, 29022, 30576, 33168, 33859, 35932, 38696, 53898, 58044, 62881, 67718, 71864, 77392, 101577, 107796, 116088, 125762, 135436, 143728, 188643, 203154, 215592, 232176, 251524, 270872, 377286, 406308, 431184, 440167, 503048, 541744, 754572, 812616, 880334, 1006096, 1320501, 1509144, 1625232, 1760668, 2641002, 3018288, 3521336, 5282004, 7042672, 10564008, 21128016]

約数ペア:

[(1, 21128016), (2, 10564008), (3, 7042672), (4, 5282004), (6, 3521336), (7, 3018288), (8, 2641002), (12, 1760668), (13, 1625232), (14, 1509144), (16, 1320501), (21, 1006096), (24, 880334), (26, 812616), (28, 754572), (39, 541744), (42, 503048), (48, 440167), (49, 431184), (52, 406308), (56, 377286), (78, 270872), (84, 251524), (91, 232176), (98, 215592), (104, 203154), (112, 188643), (147, 143728), (156, 135436), (168, 125762), (182, 116088), (196, 107796), (208, 101577), (273, 77392), (294, 71864), (312, 67718), (336, 62881), (364, 58044), (392, 53898), (546, 38696), (588, 35932), (624, 33859), (637, 33168), (691, 30576), (728, 29022), (784, 26949), (1092, 19348), (1176, 17966), (1274, 16584), (1382, 15288), (1456, 14511), (1911, 11056), (2073, 10192), (2184, 9674), (2352, 8983), (2548, 8292), (2764, 7644), (3822, 5528), (4146, 5096), (4368, 4837)]