28221291

素因数分解:

$3^5\times 7^1\times {\mathrm{47}}^1\times {\mathrm{353}}^1$

素因数の和:422

約数の個数: 48

約数和(自身を含む): 49480704

約数和(自身を除く): 21259413

約数列:

[1, 3, 7, 9, 21, 27, 47, 63, 81, 141, 189, 243, 329, 353, 423, 567, 987, 1059, 1269, 1701, 2471, 2961, 3177, 3807, 7413, 8883, 9531, 11421, 16591, 22239, 26649, 28593, 49773, 66717, 79947, 85779, 116137, 149319, 200151, 348411, 447957, 600453, 1045233, 1343871, 3135699, 4031613, 9407097, 28221291]

約数ペア:

[(1, 28221291), (3, 9407097), (7, 4031613), (9, 3135699), (21, 1343871), (27, 1045233), (47, 600453), (63, 447957), (81, 348411), (141, 200151), (189, 149319), (243, 116137), (329, 85779), (353, 79947), (423, 66717), (567, 49773), (987, 28593), (1059, 26649), (1269, 22239), (1701, 16591), (2471, 11421), (2961, 9531), (3177, 8883), (3807, 7413)]