21990809

素因数分解:

${\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{661}}^1$

素因数の和:800

約数の個数: 16

約数和(自身を含む): 24785280

約数和(自身を除く): 2794471

約数列:

[1, 17, 19, 103, 323, 661, 1751, 1957, 11237, 12559, 33269, 68083, 213503, 1157411, 1293577, 21990809]

約数ペア:

[(1, 21990809), (17, 1293577), (19, 1157411), (103, 213503), (323, 68083), (661, 33269), (1751, 12559), (1957, 11237)]