21421040

素因数分解:

$2^4\times 5^1\times {\mathrm{267763}}^1$

素因数の和:267776

約数の個数: 20

約数和(自身を含む): 49804104

約数和(自身を除く): 28383064

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 267763, 535526, 1071052, 1338815, 2142104, 2677630, 4284208, 5355260, 10710520, 21421040]

約数ペア:

[(1, 21421040), (2, 10710520), (4, 5355260), (5, 4284208), (8, 2677630), (10, 2142104), (16, 1338815), (20, 1071052), (40, 535526), (80, 267763)]