21136493

素因数分解:

$7^2\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{311}}^1$

素因数の和:417

約数の個数: 24

約数和(自身を含む): 26320320

約数和(自身を除く): 5183827

約数列:

[1, 7, 19, 49, 73, 133, 311, 511, 931, 1387, 2177, 3577, 5909, 9709, 15239, 22703, 41363, 67963, 158921, 289541, 431357, 1112447, 3019499, 21136493]

約数ペア:

[(1, 21136493), (7, 3019499), (19, 1112447), (49, 431357), (73, 289541), (133, 158921), (311, 67963), (511, 41363), (931, 22703), (1387, 15239), (2177, 9709), (3577, 5909)]