21828980

素因数分解:

$2^2\times 5^1\times {\mathrm{1021}}^1\times {\mathrm{1069}}^1$

素因数の和:2099

約数の個数: 24

約数和(自身を含む): 45928680

約数和(自身を除く): 24099700

約数列:

[1, 2, 4, 5, 10, 20, 1021, 1069, 2042, 2138, 4084, 4276, 5105, 5345, 10210, 10690, 20420, 21380, 1091449, 2182898, 4365796, 5457245, 10914490, 21828980]

約数ペア:

[(1, 21828980), (2, 10914490), (4, 5457245), (5, 4365796), (10, 2182898), (20, 1091449), (1021, 21380), (1069, 20420), (2042, 10690), (2138, 10210), (4084, 5345), (4276, 5105)]