390908020

素因数分解:

$2^2\times 5^1\times {\mathrm{157}}^1\times {\mathrm{124493}}^1$

素因数の和:124659

約数の個数: 24

約数和(自身を含む): 826142184

約数和(自身を除く): 435234164

約数列:

[1, 2, 4, 5, 10, 20, 157, 314, 628, 785, 1570, 3140, 124493, 248986, 497972, 622465, 1244930, 2489860, 19545401, 39090802, 78181604, 97727005, 195454010, 390908020]

約数ペア:

[(1, 390908020), (2, 195454010), (4, 97727005), (5, 78181604), (10, 39090802), (20, 19545401), (157, 2489860), (314, 1244930), (628, 622465), (785, 497972), (1570, 248986), (3140, 124493)]