21000865880

素因数分解:

$2^3\times 5^1\times {\mathrm{525021647}}^1$

素因数の和:525021658

約数の個数: 16

約数和(自身を含む): 47251948320

約数和(自身を除く): 26251082440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 525021647, 1050043294, 2100086588, 2625108235, 4200173176, 5250216470, 10500432940, 21000865880]

約数ペア:

[(1, 21000865880), (2, 10500432940), (4, 5250216470), (5, 4200173176), (8, 2625108235), (10, 2100086588), (20, 1050043294), (40, 525021647)]