21645416

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{208129}}^1$

素因数の和:208148

約数の個数: 16

約数和(自身を含む): 43707300

約数和(自身を除く): 22061884

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 208129, 416258, 832516, 1665032, 2705677, 5411354, 10822708, 21645416]

約数ペア:

[(1, 21645416), (2, 10822708), (4, 5411354), (8, 2705677), (13, 1665032), (26, 832516), (52, 416258), (104, 208129)]