21389961

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{5309}}^1$

素因数の和:5408

約数の個数: 16

約数和(自身を含む): 30585600

約数和(自身を除く): 9195639

約数列:

[1, 3, 17, 51, 79, 237, 1343, 4029, 5309, 15927, 90253, 270759, 419411, 1258233, 7129987, 21389961]

約数ペア:

[(1, 21389961), (3, 7129987), (17, 1258233), (51, 419411), (79, 270759), (237, 90253), (1343, 15927), (4029, 5309)]