21052861520

素因数分解:

$2^4\times 5^1\times {\mathrm{263160769}}^1$

素因数の和:263160782

約数の個数: 20

約数和(自身を含む): 48947903220

約数和(自身を除く): 27895041700

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 263160769, 526321538, 1052643076, 1315803845, 2105286152, 2631607690, 4210572304, 5263215380, 10526430760, 21052861520]

約数ペア:

[(1, 21052861520), (2, 10526430760), (4, 5263215380), (5, 4210572304), (8, 2631607690), (10, 2105286152), (16, 1315803845), (20, 1052643076), (40, 526321538), (80, 263160769)]