21221960

素因数分解:

$2^3\times 5^1\times {\mathrm{530549}}^1$

素因数の和:530560

約数の個数: 16

約数和(自身を含む): 47749500

約数和(自身を除く): 26527540

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 530549, 1061098, 2122196, 2652745, 4244392, 5305490, 10610980, 21221960]

約数ペア:

[(1, 21221960), (2, 10610980), (4, 5305490), (5, 4244392), (8, 2652745), (10, 2122196), (20, 1061098), (40, 530549)]