21281739

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{18143}}^1$

素因数の和:18186

約数の個数: 16

約数和(自身を含む): 31352832

約数和(自身を除く): 10071093

約数列:

[1, 3, 17, 23, 51, 69, 391, 1173, 18143, 54429, 308431, 417289, 925293, 1251867, 7093913, 21281739]

約数ペア:

[(1, 21281739), (3, 7093913), (17, 1251867), (23, 925293), (51, 417289), (69, 308431), (391, 54429), (1173, 18143)]