21069461

素因数分解:

$7^3\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{61}}^1$

素因数の和:154

約数の個数: 32

約数和(自身を含む): 26784000

約数和(自身を除く): 5714539

約数列:

[1, 7, 19, 49, 53, 61, 133, 343, 371, 427, 931, 1007, 1159, 2597, 2989, 3233, 6517, 7049, 8113, 18179, 20923, 22631, 49343, 56791, 61427, 158417, 345401, 397537, 429989, 1108919, 3009923, 21069461]

約数ペア:

[(1, 21069461), (7, 3009923), (19, 1108919), (49, 429989), (53, 397537), (61, 345401), (133, 158417), (343, 61427), (371, 56791), (427, 49343), (931, 22631), (1007, 20923), (1159, 18179), (2597, 8113), (2989, 7049), (3233, 6517)]