19989904

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{2143}}^1$

素因数の和:2215

約数の個数: 40

約数和(自身を含む): 43068672

約数和(自身を除く): 23078768

約数列:

[1, 2, 4, 8, 11, 16, 22, 44, 53, 88, 106, 176, 212, 424, 583, 848, 1166, 2143, 2332, 4286, 4664, 8572, 9328, 17144, 23573, 34288, 47146, 94292, 113579, 188584, 227158, 377168, 454316, 908632, 1249369, 1817264, 2498738, 4997476, 9994952, 19989904]

約数ペア:

[(1, 19989904), (2, 9994952), (4, 4997476), (8, 2498738), (11, 1817264), (16, 1249369), (22, 908632), (44, 454316), (53, 377168), (88, 227158), (106, 188584), (176, 113579), (212, 94292), (424, 47146), (583, 34288), (848, 23573), (1166, 17144), (2143, 9328), (2332, 8572), (4286, 4664)]