21961205

素因数分解:

$5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{27281}}^1$

素因数の和:27316

約数の個数: 16

約数和(自身を含む): 31428864

約数和(自身を除く): 9467659

約数列:

[1, 5, 7, 23, 35, 115, 161, 805, 27281, 136405, 190967, 627463, 954835, 3137315, 4392241, 21961205]

約数ペア:

[(1, 21961205), (5, 4392241), (7, 3137315), (23, 954835), (35, 627463), (115, 190967), (161, 136405), (805, 27281)]