21358864

素因数分解:

$2^4\times {\mathrm{401}}^1\times {\mathrm{3329}}^1$

素因数の和:3738

約数の個数: 20

約数和(自身を含む): 41498460

約数和(自身を除く): 20139596

約数列:

[1, 2, 4, 8, 16, 401, 802, 1604, 3208, 3329, 6416, 6658, 13316, 26632, 53264, 1334929, 2669858, 5339716, 10679432, 21358864]

約数ペア:

[(1, 21358864), (2, 10679432), (4, 5339716), (8, 2669858), (16, 1334929), (401, 53264), (802, 26632), (1604, 13316), (3208, 6658), (3329, 6416)]