21486521

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{103}}^1\times {\mathrm{1753}}^1$

素因数の和:1880

約数の個数: 16

約数和(自身を含む): 26267904

約数和(自身を除く): 4781383

約数列:

[1, 7, 17, 103, 119, 721, 1751, 1753, 12257, 12271, 29801, 180559, 208607, 1263913, 3069503, 21486521]

約数ペア:

[(1, 21486521), (7, 3069503), (17, 1263913), (103, 208607), (119, 180559), (721, 29801), (1751, 12271), (1753, 12257)]