21125240

素因数分解:

$2^3\times 5^1\times {\mathrm{528131}}^1$

素因数の和:528142

約数の個数: 16

約数和(自身を含む): 47531880

約数和(自身を除く): 26406640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 528131, 1056262, 2112524, 2640655, 4225048, 5281310, 10562620, 21125240]

約数ペア:

[(1, 21125240), (2, 10562620), (4, 5281310), (5, 4225048), (8, 2640655), (10, 2112524), (20, 1056262), (40, 528131)]