20505215

素因数分解:

$5^1\times {\mathrm{37}}^1\times {\mathrm{271}}^1\times {\mathrm{409}}^1$

素因数の和:722

約数の個数: 16

約数和(自身を含む): 25426560

約数和(自身を除く): 4921345

約数列:

[1, 5, 37, 185, 271, 409, 1355, 2045, 10027, 15133, 50135, 75665, 110839, 554195, 4101043, 20505215]

約数ペア:

[(1, 20505215), (5, 4101043), (37, 554195), (185, 110839), (271, 75665), (409, 50135), (1355, 15133), (2045, 10027)]