21854240

素因数分解:

$2^5\times 5^1\times {\mathrm{137}}^1\times {\mathrm{997}}^1$

素因数の和:1149

約数の個数: 48

約数和(自身を含む): 52059672

約数和(自身を除く): 30205432

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 137, 160, 274, 548, 685, 997, 1096, 1370, 1994, 2192, 2740, 3988, 4384, 4985, 5480, 7976, 9970, 10960, 15952, 19940, 21920, 31904, 39880, 79760, 136589, 159520, 273178, 546356, 682945, 1092712, 1365890, 2185424, 2731780, 4370848, 5463560, 10927120, 21854240]

約数ペア:

[(1, 21854240), (2, 10927120), (4, 5463560), (5, 4370848), (8, 2731780), (10, 2185424), (16, 1365890), (20, 1092712), (32, 682945), (40, 546356), (80, 273178), (137, 159520), (160, 136589), (274, 79760), (548, 39880), (685, 31904), (997, 21920), (1096, 19940), (1370, 15952), (1994, 10960), (2192, 9970), (2740, 7976), (3988, 5480), (4384, 4985)]