21407904

素因数分解:

$2^5\times 3^2\times 7^2\times {\mathrm{37}}^1\times {\mathrm{41}}^1$

素因数の和:108

約数の個数: 216

約数和(自身を含む): 74506068

約数和(自身を除く): 53098164

約数列:

[1, 2, 3, 4, 6, 7, 8, 9, 12, 14, 16, 18, 21, 24, 28, 32, 36, 37, 41, 42, 48, 49, 56, 63, 72, 74, 82, 84, 96, 98, 111, 112, 123, 126, 144, 147, 148, 164, 168, 196, 222, 224, 246, 252, 259, 287, 288, 294, 296, 328, 333, 336, 369, 392, 441, 444, 492, 504, 518, 574, 588, 592, 656, 666, 672, 738, 777, 784, 861, 882, 888, 984, 1008, 1036, 1148, 1176, 1184, 1312, 1332, 1476, 1517, 1554, 1568, 1722, 1764, 1776, 1813, 1968, 2009, 2016, 2072, 2296, 2331, 2352, 2583, 2664, 2952, 3034, 3108, 3444, 3528, 3552, 3626, 3936, 4018, 4144, 4551, 4592, 4662, 4704, 5166, 5328, 5439, 5904, 6027, 6068, 6216, 6888, 7056, 7252, 8036, 8288, 9102, 9184, 9324, 10332, 10619, 10656, 10878, 11808, 12054, 12136, 12432, 13653, 13776, 14112, 14504, 16072, 16317, 18081, 18204, 18648, 20664, 21238, 21756, 24108, 24272, 24864, 27306, 27552, 29008, 31857, 32144, 32634, 36162, 36408, 37296, 41328, 42476, 43512, 48216, 48544, 54612, 58016, 63714, 64288, 65268, 72324, 72816, 74333, 74592, 82656, 84952, 87024, 95571, 96432, 109224, 127428, 130536, 144648, 145632, 148666, 169904, 174048, 191142, 192864, 218448, 222999, 254856, 261072, 289296, 297332, 339808, 382284, 436896, 445998, 509712, 522144, 578592, 594664, 668997, 764568, 891996, 1019424, 1189328, 1337994, 1529136, 1783992, 2378656, 2675988, 3058272, 3567984, 5351976, 7135968, 10703952, 21407904]

約数ペア:

[(1, 21407904), (2, 10703952), (3, 7135968), (4, 5351976), (6, 3567984), (7, 3058272), (8, 2675988), (9, 2378656), (12, 1783992), (14, 1529136), (16, 1337994), (18, 1189328), (21, 1019424), (24, 891996), (28, 764568), (32, 668997), (36, 594664), (37, 578592), (41, 522144), (42, 509712), (48, 445998), (49, 436896), (56, 382284), (63, 339808), (72, 297332), (74, 289296), (82, 261072), (84, 254856), (96, 222999), (98, 218448), (111, 192864), (112, 191142), (123, 174048), (126, 169904), (144, 148666), (147, 145632), (148, 144648), (164, 130536), (168, 127428), (196, 109224), (222, 96432), (224, 95571), (246, 87024), (252, 84952), (259, 82656), (287, 74592), (288, 74333), (294, 72816), (296, 72324), (328, 65268), (333, 64288), (336, 63714), (369, 58016), (392, 54612), (441, 48544), (444, 48216), (492, 43512), (504, 42476), (518, 41328), (574, 37296), (588, 36408), (592, 36162), (656, 32634), (666, 32144), (672, 31857), (738, 29008), (777, 27552), (784, 27306), (861, 24864), (882, 24272), (888, 24108), (984, 21756), (1008, 21238), (1036, 20664), (1148, 18648), (1176, 18204), (1184, 18081), (1312, 16317), (1332, 16072), (1476, 14504), (1517, 14112), (1554, 13776), (1568, 13653), (1722, 12432), (1764, 12136), (1776, 12054), (1813, 11808), (1968, 10878), (2009, 10656), (2016, 10619), (2072, 10332), (2296, 9324), (2331, 9184), (2352, 9102), (2583, 8288), (2664, 8036), (2952, 7252), (3034, 7056), (3108, 6888), (3444, 6216), (3528, 6068), (3552, 6027), (3626, 5904), (3936, 5439), (4018, 5328), (4144, 5166), (4551, 4704), (4592, 4662)]