21221320

素因数分解:

$2^3\times 5^1\times {\mathrm{530533}}^1$

素因数の和:530544

約数の個数: 16

約数和(自身を含む): 47748060

約数和(自身を除く): 26526740

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 530533, 1061066, 2122132, 2652665, 4244264, 5305330, 10610660, 21221320]

約数ペア:

[(1, 21221320), (2, 10610660), (4, 5305330), (5, 4244264), (8, 2652665), (10, 2122132), (20, 1061066), (40, 530533)]