21009621040

素因数分解:

$2^4\times 5^1\times {\mathrm{262620263}}^1$

素因数の和:262620276

約数の個数: 20

約数和(自身を含む): 48847369104

約数和(自身を除く): 27837748064

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 262620263, 525240526, 1050481052, 1313101315, 2100962104, 2626202630, 4201924208, 5252405260, 10504810520, 21009621040]

約数ペア:

[(1, 21009621040), (2, 10504810520), (4, 5252405260), (5, 4201924208), (8, 2626202630), (10, 2100962104), (16, 1313101315), (20, 1050481052), (40, 525240526), (80, 262620263)]