21401408

素因数分解:

$2^6\times 7^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{67}}^1$

素因数の和:140

約数の個数: 112

約数和(自身を含む): 53059584

約数和(自身を除く): 31658176

約数列:

[1, 2, 4, 7, 8, 14, 16, 23, 28, 31, 32, 46, 56, 62, 64, 67, 92, 112, 124, 134, 161, 184, 217, 224, 248, 268, 322, 368, 434, 448, 469, 496, 536, 644, 713, 736, 868, 938, 992, 1072, 1288, 1426, 1472, 1541, 1736, 1876, 1984, 2077, 2144, 2576, 2852, 3082, 3472, 3752, 4154, 4288, 4991, 5152, 5704, 6164, 6944, 7504, 8308, 9982, 10304, 10787, 11408, 12328, 13888, 14539, 15008, 16616, 19964, 21574, 22816, 24656, 29078, 30016, 33232, 39928, 43148, 45632, 47771, 49312, 58156, 66464, 79856, 86296, 95542, 98624, 116312, 132928, 159712, 172592, 191084, 232624, 319424, 334397, 345184, 382168, 465248, 668794, 690368, 764336, 930496, 1337588, 1528672, 2675176, 3057344, 5350352, 10700704, 21401408]

約数ペア:

[(1, 21401408), (2, 10700704), (4, 5350352), (7, 3057344), (8, 2675176), (14, 1528672), (16, 1337588), (23, 930496), (28, 764336), (31, 690368), (32, 668794), (46, 465248), (56, 382168), (62, 345184), (64, 334397), (67, 319424), (92, 232624), (112, 191084), (124, 172592), (134, 159712), (161, 132928), (184, 116312), (217, 98624), (224, 95542), (248, 86296), (268, 79856), (322, 66464), (368, 58156), (434, 49312), (448, 47771), (469, 45632), (496, 43148), (536, 39928), (644, 33232), (713, 30016), (736, 29078), (868, 24656), (938, 22816), (992, 21574), (1072, 19964), (1288, 16616), (1426, 15008), (1472, 14539), (1541, 13888), (1736, 12328), (1876, 11408), (1984, 10787), (2077, 10304), (2144, 9982), (2576, 8308), (2852, 7504), (3082, 6944), (3472, 6164), (3752, 5704), (4154, 5152), (4288, 4991)]