21249167

素因数分解:

${\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{661}}^1$

素因数の和:770

約数の個数: 16

約数和(自身を含む): 23641344

約数和(自身を除く): 2392177

約数列:

[1, 17, 31, 61, 527, 661, 1037, 1891, 11237, 20491, 32147, 40321, 348347, 685457, 1249951, 21249167]

約数ペア:

[(1, 21249167), (17, 1249951), (31, 685457), (61, 348347), (527, 40321), (661, 32147), (1037, 20491), (1891, 11237)]