21525380

素因数分解:

$2^2\times 5^1\times {\mathrm{269}}^1\times {\mathrm{4001}}^1$

素因数の和:4279

約数の個数: 24

約数和(自身を含む): 45382680

約数和(自身を除く): 23857300

約数列:

[1, 2, 4, 5, 10, 20, 269, 538, 1076, 1345, 2690, 4001, 5380, 8002, 16004, 20005, 40010, 80020, 1076269, 2152538, 4305076, 5381345, 10762690, 21525380]

約数ペア:

[(1, 21525380), (2, 10762690), (4, 5381345), (5, 4305076), (10, 2152538), (20, 1076269), (269, 80020), (538, 40010), (1076, 20005), (1345, 16004), (2690, 8002), (4001, 5380)]