21129254

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{67}}^1\times {\mathrm{193}}^1$

素因数の和:324

約数の個数: 32

約数和(自身を含む): 34826880

約数和(自身を除く): 13697626

約数列:

[1, 2, 19, 38, 43, 67, 86, 134, 193, 386, 817, 1273, 1634, 2546, 2881, 3667, 5762, 7334, 8299, 12931, 16598, 25862, 54739, 109478, 157681, 245689, 315362, 491378, 556033, 1112066, 10564627, 21129254]

約数ペア:

[(1, 21129254), (2, 10564627), (19, 1112066), (38, 556033), (43, 491378), (67, 315362), (86, 245689), (134, 157681), (193, 109478), (386, 54739), (817, 25862), (1273, 16598), (1634, 12931), (2546, 8299), (2881, 7334), (3667, 5762)]