21780385

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{107}}^1\times {\mathrm{3701}}^1$

素因数の和:3824

約数の個数: 16

約数和(自身を含む): 28786752

約数和(自身を除く): 7006367

約数列:

[1, 5, 11, 55, 107, 535, 1177, 3701, 5885, 18505, 40711, 203555, 396007, 1980035, 4356077, 21780385]

約数ペア:

[(1, 21780385), (5, 4356077), (11, 1980035), (55, 396007), (107, 203555), (535, 40711), (1177, 18505), (3701, 5885)]