21405406

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{269}}^1\times {\mathrm{3617}}^1$

素因数の和:3899

約数の個数: 16

約数和(自身を含む): 35166960

約数和(自身を除く): 13761554

約数列:

[1, 2, 11, 22, 269, 538, 2959, 3617, 5918, 7234, 39787, 79574, 972973, 1945946, 10702703, 21405406]

約数ペア:

[(1, 21405406), (2, 10702703), (11, 1945946), (22, 972973), (269, 79574), (538, 39787), (2959, 7234), (3617, 5918)]