15920721

素因数分解:

$3^2\times {\mathrm{17}}^2\times {\mathrm{6121}}^1$

素因数の和:6161

約数の個数: 18

約数和(自身を含む): 24432902

約数和(自身を除く): 8512181

約数列:

[1, 3, 9, 17, 51, 153, 289, 867, 2601, 6121, 18363, 55089, 104057, 312171, 936513, 1768969, 5306907, 15920721]

約数ペア:

[(1, 15920721), (3, 5306907), (9, 1768969), (17, 936513), (51, 312171), (153, 104057), (289, 55089), (867, 18363), (2601, 6121)]