21990024

素因数分解:

$2^3\times 3^2\times 7^2\times {\mathrm{23}}^1\times {\mathrm{271}}^1$

素因数の和:320

約数の個数: 144

約数和(自身を含む): 72558720

約数和(自身を除く): 50568696

約数列:

[1, 2, 3, 4, 6, 7, 8, 9, 12, 14, 18, 21, 23, 24, 28, 36, 42, 46, 49, 56, 63, 69, 72, 84, 92, 98, 126, 138, 147, 161, 168, 184, 196, 207, 252, 271, 276, 294, 322, 392, 414, 441, 483, 504, 542, 552, 588, 644, 813, 828, 882, 966, 1084, 1127, 1176, 1288, 1449, 1626, 1656, 1764, 1897, 1932, 2168, 2254, 2439, 2898, 3252, 3381, 3528, 3794, 3864, 4508, 4878, 5691, 5796, 6233, 6504, 6762, 7588, 9016, 9756, 10143, 11382, 11592, 12466, 13279, 13524, 15176, 17073, 18699, 19512, 20286, 22764, 24932, 26558, 27048, 34146, 37398, 39837, 40572, 43631, 45528, 49864, 53116, 56097, 68292, 74796, 79674, 81144, 87262, 106232, 112194, 119511, 130893, 136584, 149592, 159348, 174524, 224388, 239022, 261786, 305417, 318696, 349048, 392679, 448776, 478044, 523572, 610834, 785358, 916251, 956088, 1047144, 1221668, 1570716, 1832502, 2443336, 2748753, 3141432, 3665004, 5497506, 7330008, 10995012, 21990024]

約数ペア:

[(1, 21990024), (2, 10995012), (3, 7330008), (4, 5497506), (6, 3665004), (7, 3141432), (8, 2748753), (9, 2443336), (12, 1832502), (14, 1570716), (18, 1221668), (21, 1047144), (23, 956088), (24, 916251), (28, 785358), (36, 610834), (42, 523572), (46, 478044), (49, 448776), (56, 392679), (63, 349048), (69, 318696), (72, 305417), (84, 261786), (92, 239022), (98, 224388), (126, 174524), (138, 159348), (147, 149592), (161, 136584), (168, 130893), (184, 119511), (196, 112194), (207, 106232), (252, 87262), (271, 81144), (276, 79674), (294, 74796), (322, 68292), (392, 56097), (414, 53116), (441, 49864), (483, 45528), (504, 43631), (542, 40572), (552, 39837), (588, 37398), (644, 34146), (813, 27048), (828, 26558), (882, 24932), (966, 22764), (1084, 20286), (1127, 19512), (1176, 18699), (1288, 17073), (1449, 15176), (1626, 13524), (1656, 13279), (1764, 12466), (1897, 11592), (1932, 11382), (2168, 10143), (2254, 9756), (2439, 9016), (2898, 7588), (3252, 6762), (3381, 6504), (3528, 6233), (3794, 5796), (3864, 5691), (4508, 4878)]