28278789

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{31}}^1\times {\mathrm{359}}^1$

素因数の和:422

約数の個数: 48

約数和(自身を含む): 49029120

約数和(自身を除く): 20750331

約数列:

[1, 3, 7, 11, 21, 31, 33, 77, 93, 121, 217, 231, 341, 359, 363, 651, 847, 1023, 1077, 2387, 2513, 2541, 3751, 3949, 7161, 7539, 11129, 11253, 11847, 26257, 27643, 33387, 43439, 77903, 78771, 82929, 122419, 130317, 233709, 304073, 367257, 856933, 912219, 1346609, 2570799, 4039827, 9426263, 28278789]

約数ペア:

[(1, 28278789), (3, 9426263), (7, 4039827), (11, 2570799), (21, 1346609), (31, 912219), (33, 856933), (77, 367257), (93, 304073), (121, 233709), (217, 130317), (231, 122419), (341, 82929), (359, 78771), (363, 77903), (651, 43439), (847, 33387), (1023, 27643), (1077, 26257), (2387, 11847), (2513, 11253), (2541, 11129), (3751, 7539), (3949, 7161)]