21354669

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{127}}^1\times {\mathrm{157}}^1$

素因数の和:314

約数の個数: 48

約数和(自身を含む): 37859328

約数和(自身を除く): 16504659

約数列:

[1, 3, 7, 9, 17, 21, 51, 63, 119, 127, 153, 157, 357, 381, 471, 889, 1071, 1099, 1143, 1413, 2159, 2667, 2669, 3297, 6477, 8001, 8007, 9891, 15113, 18683, 19431, 19939, 24021, 45339, 56049, 59817, 136017, 139573, 168147, 179451, 338963, 418719, 1016889, 1256157, 2372741, 3050667, 7118223, 21354669]

約数ペア:

[(1, 21354669), (3, 7118223), (7, 3050667), (9, 2372741), (17, 1256157), (21, 1016889), (51, 418719), (63, 338963), (119, 179451), (127, 168147), (153, 139573), (157, 136017), (357, 59817), (381, 56049), (471, 45339), (889, 24021), (1071, 19939), (1099, 19431), (1143, 18683), (1413, 15113), (2159, 9891), (2667, 8007), (2669, 8001), (3297, 6477)]