21220040

素因数分解:

$2^3\times 5^1\times {\mathrm{530501}}^1$

素因数の和:530512

約数の個数: 16

約数和(自身を含む): 47745180

約数和(自身を除く): 26525140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 530501, 1061002, 2122004, 2652505, 4244008, 5305010, 10610020, 21220040]

約数ペア:

[(1, 21220040), (2, 10610020), (4, 5305010), (5, 4244008), (8, 2652505), (10, 2122004), (20, 1061002), (40, 530501)]