21061240

素因数分解:

$2^3\times 5^1\times {\mathrm{526531}}^1$

素因数の和:526542

約数の個数: 16

約数和(自身を含む): 47387880

約数和(自身を除く): 26326640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 526531, 1053062, 2106124, 2632655, 4212248, 5265310, 10530620, 21061240]

約数ペア:

[(1, 21061240), (2, 10530620), (4, 5265310), (5, 4212248), (8, 2632655), (10, 2106124), (20, 1053062), (40, 526531)]