21989242

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{43457}}^1$

素因数の和:43493

約数の個数: 16

約数和(自身を含む): 37547712

約数和(自身を除く): 15558470

約数列:

[1, 2, 11, 22, 23, 46, 253, 506, 43457, 86914, 478027, 956054, 999511, 1999022, 10994621, 21989242]

約数ペア:

[(1, 21989242), (2, 10994621), (11, 1999022), (22, 999511), (23, 956054), (46, 478027), (253, 86914), (506, 43457)]