20881900

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{16063}}^1$

素因数の和:16090

約数の個数: 36

約数和(自身を含む): 48802432

約数和(自身を除く): 27920532

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 130, 260, 325, 650, 1300, 16063, 32126, 64252, 80315, 160630, 208819, 321260, 401575, 417638, 803150, 835276, 1044095, 1606300, 2088190, 4176380, 5220475, 10440950, 20881900]

約数ペア:

[(1, 20881900), (2, 10440950), (4, 5220475), (5, 4176380), (10, 2088190), (13, 1606300), (20, 1044095), (25, 835276), (26, 803150), (50, 417638), (52, 401575), (65, 321260), (100, 208819), (130, 160630), (260, 80315), (325, 64252), (650, 32126), (1300, 16063)]