20380905

素因数分解:

$3^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{6379}}^1$

素因数の和:6461

約数の個数: 24

約数和(自身を含む): 35830080

約数和(自身を除く): 15449175

約数列:

[1, 3, 5, 9, 15, 45, 71, 213, 355, 639, 1065, 3195, 6379, 19137, 31895, 57411, 95685, 287055, 452909, 1358727, 2264545, 4076181, 6793635, 20380905]

約数ペア:

[(1, 20380905), (3, 6793635), (5, 4076181), (9, 2264545), (15, 1358727), (45, 452909), (71, 287055), (213, 95685), (355, 57411), (639, 31895), (1065, 19137), (3195, 6379)]