21235669

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1$

素因数の和:134

約数の個数: 48

約数和(自身を含む): 29474928

約数和(自身を除く): 8239259

約数列:

[1, 7, 13, 17, 37, 49, 53, 91, 119, 221, 259, 371, 481, 629, 637, 689, 833, 901, 1547, 1813, 1961, 2597, 3367, 4403, 4823, 6307, 8177, 10829, 11713, 13727, 23569, 25493, 30821, 33337, 33761, 44149, 57239, 81991, 96089, 178451, 233359, 400673, 433381, 573937, 1249157, 1633513, 3033667, 21235669]

約数ペア:

[(1, 21235669), (7, 3033667), (13, 1633513), (17, 1249157), (37, 573937), (49, 433381), (53, 400673), (91, 233359), (119, 178451), (221, 96089), (259, 81991), (371, 57239), (481, 44149), (629, 33761), (637, 33337), (689, 30821), (833, 25493), (901, 23569), (1547, 13727), (1813, 11713), (1961, 10829), (2597, 8177), (3367, 6307), (4403, 4823)]