19702205

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{1609}}^1$

素因数の和:1724

約数の個数: 16

約数和(自身を含む): 24729600

約数和(自身を除く): 5027395

約数列:

[1, 5, 31, 79, 155, 395, 1609, 2449, 8045, 12245, 49879, 127111, 249395, 635555, 3940441, 19702205]

約数ペア:

[(1, 19702205), (5, 3940441), (31, 635555), (79, 249395), (155, 127111), (395, 49879), (1609, 12245), (2449, 8045)]