20401240

素因数分解:

$2^3\times 5^1\times {\mathrm{510031}}^1$

素因数の和:510042

約数の個数: 16

約数和(自身を含む): 45902880

約数和(自身を除く): 25501640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 510031, 1020062, 2040124, 2550155, 4080248, 5100310, 10200620, 20401240]

約数ペア:

[(1, 20401240), (2, 10200620), (4, 5100310), (5, 4080248), (8, 2550155), (10, 2040124), (20, 1020062), (40, 510031)]