21084371

素因数分解:

$7^1\times {\mathrm{11}}^3\times {\mathrm{31}}^1\times {\mathrm{73}}^1$

素因数の和:144

約数の個数: 32

約数和(自身を含む): 27734016

約数和(自身を除く): 6649645

約数列:

[1, 7, 11, 31, 73, 77, 121, 217, 341, 511, 803, 847, 1331, 2263, 2387, 3751, 5621, 8833, 9317, 15841, 24893, 26257, 41261, 61831, 97163, 174251, 273823, 288827, 680141, 1916761, 3012053, 21084371]

約数ペア:

[(1, 21084371), (7, 3012053), (11, 1916761), (31, 680141), (73, 288827), (77, 273823), (121, 174251), (217, 97163), (341, 61831), (511, 41261), (803, 26257), (847, 24893), (1331, 15841), (2263, 9317), (2387, 8833), (3751, 5621)]