21179216

素因数分解:

$2^4\times {\mathrm{401}}^1\times {\mathrm{3301}}^1$

素因数の和:3710

約数の個数: 20

約数和(自身を含む): 41149524

約数和(自身を除く): 19970308

約数列:

[1, 2, 4, 8, 16, 401, 802, 1604, 3208, 3301, 6416, 6602, 13204, 26408, 52816, 1323701, 2647402, 5294804, 10589608, 21179216]

約数ペア:

[(1, 21179216), (2, 10589608), (4, 5294804), (8, 2647402), (16, 1323701), (401, 52816), (802, 26408), (1604, 13204), (3208, 6602), (3301, 6416)]