21720832

素因数分解:

$2^8\times 7^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1$

素因数の和:94

約数の個数: 144

約数和(自身を含む): 56512512

約数和(自身を除く): 34791680

約数列:

[1, 2, 4, 7, 8, 14, 16, 17, 23, 28, 31, 32, 34, 46, 56, 62, 64, 68, 92, 112, 119, 124, 128, 136, 161, 184, 217, 224, 238, 248, 256, 272, 322, 368, 391, 434, 448, 476, 496, 527, 544, 644, 713, 736, 782, 868, 896, 952, 992, 1054, 1088, 1288, 1426, 1472, 1564, 1736, 1792, 1904, 1984, 2108, 2176, 2576, 2737, 2852, 2944, 3128, 3472, 3689, 3808, 3968, 4216, 4352, 4991, 5152, 5474, 5704, 5888, 6256, 6944, 7378, 7616, 7936, 8432, 9982, 10304, 10948, 11408, 12121, 12512, 13888, 14756, 15232, 16864, 19964, 20608, 21896, 22816, 24242, 25024, 27776, 29512, 30464, 33728, 39928, 41216, 43792, 45632, 48484, 50048, 55552, 59024, 67456, 79856, 84847, 87584, 91264, 96968, 100096, 118048, 134912, 159712, 169694, 175168, 182528, 193936, 236096, 319424, 339388, 350336, 387872, 472192, 638848, 678776, 700672, 775744, 944384, 1277696, 1357552, 1551488, 2715104, 3102976, 5430208, 10860416, 21720832]

約数ペア:

[(1, 21720832), (2, 10860416), (4, 5430208), (7, 3102976), (8, 2715104), (14, 1551488), (16, 1357552), (17, 1277696), (23, 944384), (28, 775744), (31, 700672), (32, 678776), (34, 638848), (46, 472192), (56, 387872), (62, 350336), (64, 339388), (68, 319424), (92, 236096), (112, 193936), (119, 182528), (124, 175168), (128, 169694), (136, 159712), (161, 134912), (184, 118048), (217, 100096), (224, 96968), (238, 91264), (248, 87584), (256, 84847), (272, 79856), (322, 67456), (368, 59024), (391, 55552), (434, 50048), (448, 48484), (476, 45632), (496, 43792), (527, 41216), (544, 39928), (644, 33728), (713, 30464), (736, 29512), (782, 27776), (868, 25024), (896, 24242), (952, 22816), (992, 21896), (1054, 20608), (1088, 19964), (1288, 16864), (1426, 15232), (1472, 14756), (1564, 13888), (1736, 12512), (1792, 12121), (1904, 11408), (1984, 10948), (2108, 10304), (2176, 9982), (2576, 8432), (2737, 7936), (2852, 7616), (2944, 7378), (3128, 6944), (3472, 6256), (3689, 5888), (3808, 5704), (3968, 5474), (4216, 5152), (4352, 4991)]