21687680

素因数分解:

$2^7\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{103}}^1$

素因数の和:176

約数の個数: 128

約数和(自身を含む): 61102080

約数和(自身を除く): 39414400

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 47, 56, 64, 70, 80, 94, 103, 112, 128, 140, 160, 188, 206, 224, 235, 280, 320, 329, 376, 412, 448, 470, 515, 560, 640, 658, 721, 752, 824, 896, 940, 1030, 1120, 1316, 1442, 1504, 1645, 1648, 1880, 2060, 2240, 2632, 2884, 3008, 3290, 3296, 3605, 3760, 4120, 4480, 4841, 5264, 5768, 6016, 6580, 6592, 7210, 7520, 8240, 9682, 10528, 11536, 13160, 13184, 14420, 15040, 16480, 19364, 21056, 23072, 24205, 26320, 28840, 30080, 32960, 33887, 38728, 42112, 46144, 48410, 52640, 57680, 65920, 67774, 77456, 92288, 96820, 105280, 115360, 135548, 154912, 169435, 193640, 210560, 230720, 271096, 309824, 338870, 387280, 461440, 542192, 619648, 677740, 774560, 1084384, 1355480, 1549120, 2168768, 2710960, 3098240, 4337536, 5421920, 10843840, 21687680]

約数ペア:

[(1, 21687680), (2, 10843840), (4, 5421920), (5, 4337536), (7, 3098240), (8, 2710960), (10, 2168768), (14, 1549120), (16, 1355480), (20, 1084384), (28, 774560), (32, 677740), (35, 619648), (40, 542192), (47, 461440), (56, 387280), (64, 338870), (70, 309824), (80, 271096), (94, 230720), (103, 210560), (112, 193640), (128, 169435), (140, 154912), (160, 135548), (188, 115360), (206, 105280), (224, 96820), (235, 92288), (280, 77456), (320, 67774), (329, 65920), (376, 57680), (412, 52640), (448, 48410), (470, 46144), (515, 42112), (560, 38728), (640, 33887), (658, 32960), (721, 30080), (752, 28840), (824, 26320), (896, 24205), (940, 23072), (1030, 21056), (1120, 19364), (1316, 16480), (1442, 15040), (1504, 14420), (1645, 13184), (1648, 13160), (1880, 11536), (2060, 10528), (2240, 9682), (2632, 8240), (2884, 7520), (3008, 7210), (3290, 6592), (3296, 6580), (3605, 6016), (3760, 5768), (4120, 5264), (4480, 4841)]