21151256

素因数分解:

$2^3\times 7^1\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{193}}^1$

素因数の和:328

約数の個数: 64

約数和(自身を含む): 48422400

約数和(自身を除く): 27271144

約数列:

[1, 2, 4, 7, 8, 14, 19, 28, 38, 56, 76, 103, 133, 152, 193, 206, 266, 386, 412, 532, 721, 772, 824, 1064, 1351, 1442, 1544, 1957, 2702, 2884, 3667, 3914, 5404, 5768, 7334, 7828, 10808, 13699, 14668, 15656, 19879, 25669, 27398, 29336, 39758, 51338, 54796, 79516, 102676, 109592, 139153, 159032, 205352, 278306, 377701, 556612, 755402, 1113224, 1510804, 2643907, 3021608, 5287814, 10575628, 21151256]

約数ペア:

[(1, 21151256), (2, 10575628), (4, 5287814), (7, 3021608), (8, 2643907), (14, 1510804), (19, 1113224), (28, 755402), (38, 556612), (56, 377701), (76, 278306), (103, 205352), (133, 159032), (152, 139153), (193, 109592), (206, 102676), (266, 79516), (386, 54796), (412, 51338), (532, 39758), (721, 29336), (772, 27398), (824, 25669), (1064, 19879), (1351, 15656), (1442, 14668), (1544, 13699), (1957, 10808), (2702, 7828), (2884, 7334), (3667, 5768), (3914, 5404)]