21205168

素因数分解:

$2^4\times {\mathrm{389}}^1\times {\mathrm{3407}}^1$

素因数の和:3804

約数の個数: 20

約数和(自身を含む): 41202720

約数和(自身を除く): 19997552

約数列:

[1, 2, 4, 8, 16, 389, 778, 1556, 3112, 3407, 6224, 6814, 13628, 27256, 54512, 1325323, 2650646, 5301292, 10602584, 21205168]

約数ペア:

[(1, 21205168), (2, 10602584), (4, 5301292), (8, 2650646), (16, 1325323), (389, 54512), (778, 27256), (1556, 13628), (3112, 6814), (3407, 6224)]