78431590

素因数分解:

$2^1\times 5^1\times {\mathrm{401}}^1\times {\mathrm{19559}}^1$

素因数の和:19967

約数の個数: 16

約数和(自身を含む): 141536160

約数和(自身を除く): 63104570

約数列:

[1, 2, 5, 10, 401, 802, 2005, 4010, 19559, 39118, 97795, 195590, 7843159, 15686318, 39215795, 78431590]

約数ペア:

[(1, 78431590), (2, 39215795), (5, 15686318), (10, 7843159), (401, 195590), (802, 97795), (2005, 39118), (4010, 19559)]